/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:09:51,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:09:51,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:09:51,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 05:09:51,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 05:09:51,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 05:09:51,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 05:09:51,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 05:09:51,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 05:09:51,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 05:09:51,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 05:09:51,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 05:09:51,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 05:09:51,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 05:09:51,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 05:09:51,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 05:09:51,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 05:09:51,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 05:09:51,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 05:09:51,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 05:09:51,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 05:09:51,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 05:09:51,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 05:09:51,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 05:09:51,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 05:09:51,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 05:09:51,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 05:09:51,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 05:09:51,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 05:09:51,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 05:09:51,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 05:09:51,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 05:09:51,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 05:09:51,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 05:09:51,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 05:09:51,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 05:09:51,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 05:09:51,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 05:09:51,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:09:51,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:09:51,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:09:51,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:09:51,856 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:09:51,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:09:51,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:09:51,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:09:51,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:09:51,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:09:51,860 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:09:51,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:09:51,860 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:09:51,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:09:51,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:09:51,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:09:51,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:09:51,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:09:51,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:09:51,862 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:09:51,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:09:51,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:09:51,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:09:51,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:09:51,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:09:51,863 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:09:51,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:09:51,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:09:51,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:09:51,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:09:51,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:09:51,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:09:51,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:09:51,864 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:09:51,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:09:51,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:09:52,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:09:52,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:09:52,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:09:52,193 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:09:52,194 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:09:52,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2021-06-05 05:09:52,195 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2021-06-05 05:09:52,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:09:52,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:09:52,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:09:52,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:09:52,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:09:52,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... [2021-06-05 05:09:52,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... [2021-06-05 05:09:52,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:09:52,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:09:52,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:09:52,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:09:52,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... [2021-06-05 05:09:52,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... [2021-06-05 05:09:52,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... [2021-06-05 05:09:52,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... [2021-06-05 05:09:52,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... [2021-06-05 05:09:52,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... [2021-06-05 05:09:52,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... [2021-06-05 05:09:52,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:09:52,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:09:52,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:09:52,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:09:52,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:09:52,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:09:52,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:09:52,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:09:52,370 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:09:52,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:09:52,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:09:52,371 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:09:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:09:52,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:09:52,371 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:09:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:09:52,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:09:52,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:09:52,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:09:52,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:09:52,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 05:09:52,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 05:09:52,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 05:09:52,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-05 05:09:52,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-05 05:09:52,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-05 05:09:52,375 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:09:52,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:09:52,604 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 05:09:52,605 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 05:09:52,605 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 05:09:52,605 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-05 05:09:52,606 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-05 05:09:52,607 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:09:52 BoogieIcfgContainer [2021-06-05 05:09:52,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:09:52,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:09:52,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:09:52,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:09:52,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:09:52" (1/2) ... [2021-06-05 05:09:52,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f427681 and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:09:52, skipping insertion in model container [2021-06-05 05:09:52,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:09:52" (2/2) ... [2021-06-05 05:09:52,628 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2021-06-05 05:09:52,633 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:09:52,633 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:09:52,633 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:09:52,634 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:09:52,778 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-06-05 05:09:52,799 INFO L255 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-06-05 05:09:52,829 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:09:52,830 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:09:52,830 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:09:52,830 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:09:52,830 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:09:52,830 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:09:52,830 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:09:52,830 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:09:52,842 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-05 05:09:52,885 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:09:52,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:52,903 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:52,903 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2039335680, now seen corresponding path program 1 times [2021-06-05 05:09:52,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:52,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044329787] [2021-06-05 05:09:52,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:53,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:53,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044329787] [2021-06-05 05:09:53,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044329787] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:53,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:53,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:09:53,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98122182] [2021-06-05 05:09:53,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:09:53,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:53,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:09:53,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:09:53,097 INFO L87 Difference]: Start difference. First operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:53,175 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2021-06-05 05:09:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:09:53,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:09:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:53,200 INFO L225 Difference]: With dead ends: 1089 [2021-06-05 05:09:53,200 INFO L226 Difference]: Without dead ends: 1068 [2021-06-05 05:09:53,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:09:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-06-05 05:09:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2021-06-05 05:09:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2021-06-05 05:09:53,283 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2021-06-05 05:09:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:53,284 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2021-06-05 05:09:53,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2021-06-05 05:09:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:09:53,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:53,288 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:53,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:09:53,288 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1643355036, now seen corresponding path program 2 times [2021-06-05 05:09:53,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:53,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485409610] [2021-06-05 05:09:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:53,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:53,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485409610] [2021-06-05 05:09:53,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485409610] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:53,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:53,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:09:53,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404855105] [2021-06-05 05:09:53,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:09:53,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:53,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:09:53,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:09:53,364 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:53,410 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2021-06-05 05:09:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:09:53,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:09:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:53,419 INFO L225 Difference]: With dead ends: 1218 [2021-06-05 05:09:53,419 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 05:09:53,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:09:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 05:09:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2021-06-05 05:09:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2021-06-05 05:09:53,474 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2021-06-05 05:09:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:53,475 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2021-06-05 05:09:53,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2021-06-05 05:09:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:53,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:53,477 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:53,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:09:53,477 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:53,478 INFO L82 PathProgramCache]: Analyzing trace with hash -661584511, now seen corresponding path program 1 times [2021-06-05 05:09:53,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:53,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781379229] [2021-06-05 05:09:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:53,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:53,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781379229] [2021-06-05 05:09:53,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781379229] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:53,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:53,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:09:53,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653373769] [2021-06-05 05:09:53,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:09:53,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:53,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:09:53,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:09:53,524 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:53,545 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2021-06-05 05:09:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:09:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:53,549 INFO L225 Difference]: With dead ends: 545 [2021-06-05 05:09:53,549 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 05:09:53,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:09:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 05:09:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-06-05 05:09:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2021-06-05 05:09:53,566 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2021-06-05 05:09:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:53,566 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2021-06-05 05:09:53,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2021-06-05 05:09:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:53,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:53,568 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:53,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:09:53,569 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:53,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1934875805, now seen corresponding path program 2 times [2021-06-05 05:09:53,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:53,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605861501] [2021-06-05 05:09:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:53,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:53,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605861501] [2021-06-05 05:09:53,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605861501] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:53,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:53,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:09:53,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019539123] [2021-06-05 05:09:53,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:09:53,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:53,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:09:53,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:09:53,608 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:53,748 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2021-06-05 05:09:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:09:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:53,758 INFO L225 Difference]: With dead ends: 1358 [2021-06-05 05:09:53,758 INFO L226 Difference]: Without dead ends: 1346 [2021-06-05 05:09:53,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:09:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-06-05 05:09:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2021-06-05 05:09:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2021-06-05 05:09:53,796 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2021-06-05 05:09:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:53,796 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2021-06-05 05:09:53,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2021-06-05 05:09:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:53,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:53,800 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:53,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:09:53,801 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:53,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:53,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2074450649, now seen corresponding path program 1 times [2021-06-05 05:09:53,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:53,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067620425] [2021-06-05 05:09:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:53,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:53,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067620425] [2021-06-05 05:09:53,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067620425] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:53,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:53,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:09:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483521148] [2021-06-05 05:09:53,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:09:53,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:53,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:09:53,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:09:53,847 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:53,873 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2021-06-05 05:09:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:09:53,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:53,879 INFO L225 Difference]: With dead ends: 652 [2021-06-05 05:09:53,879 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 05:09:53,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:09:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 05:09:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-06-05 05:09:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2021-06-05 05:09:53,903 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2021-06-05 05:09:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:53,903 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2021-06-05 05:09:53,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2021-06-05 05:09:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:53,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:53,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:53,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:09:53,906 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1944733407, now seen corresponding path program 1 times [2021-06-05 05:09:53,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:53,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750783852] [2021-06-05 05:09:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:53,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:53,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750783852] [2021-06-05 05:09:53,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750783852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:53,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062424389] [2021-06-05 05:09:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:54,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:09:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:54,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062424389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:54,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:54,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:09:54,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286457831] [2021-06-05 05:09:54,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:09:54,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:54,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:09:54,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:09:54,168 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:54,232 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2021-06-05 05:09:54,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:09:54,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:54,238 INFO L225 Difference]: With dead ends: 1057 [2021-06-05 05:09:54,238 INFO L226 Difference]: Without dead ends: 989 [2021-06-05 05:09:54,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-05 05:09:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2021-06-05 05:09:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2021-06-05 05:09:54,267 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2021-06-05 05:09:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:54,268 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2021-06-05 05:09:54,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2021-06-05 05:09:54,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:54,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:54,270 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:54,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 05:09:54,493 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1051081059, now seen corresponding path program 2 times [2021-06-05 05:09:54,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:54,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221294617] [2021-06-05 05:09:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:54,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:54,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221294617] [2021-06-05 05:09:54,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221294617] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:54,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:54,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:09:54,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220153874] [2021-06-05 05:09:54,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:09:54,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:54,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:09:54,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:09:54,541 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:54,623 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2021-06-05 05:09:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:09:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:54,629 INFO L225 Difference]: With dead ends: 990 [2021-06-05 05:09:54,629 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 05:09:54,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 05:09:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2021-06-05 05:09:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2021-06-05 05:09:54,652 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2021-06-05 05:09:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:54,654 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2021-06-05 05:09:54,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2021-06-05 05:09:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:54,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:54,659 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:54,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 05:09:54,659 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash 628675505, now seen corresponding path program 3 times [2021-06-05 05:09:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:54,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213461912] [2021-06-05 05:09:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:54,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213461912] [2021-06-05 05:09:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213461912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953691507] [2021-06-05 05:09:54,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:54,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:09:54,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:54,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:09:54,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:54,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953691507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:54,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:54,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:09:54,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756479388] [2021-06-05 05:09:54,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:09:54,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:54,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:09:54,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:09:54,816 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:54,877 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2021-06-05 05:09:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:09:54,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:54,884 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 05:09:54,884 INFO L226 Difference]: Without dead ends: 949 [2021-06-05 05:09:54,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-05 05:09:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2021-06-05 05:09:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2021-06-05 05:09:54,904 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2021-06-05 05:09:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:54,905 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2021-06-05 05:09:54,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2021-06-05 05:09:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:54,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:54,907 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:55,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:55,130 INFO L430 AbstractCegarLoop]: === Iteration 9 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1476649541, now seen corresponding path program 4 times [2021-06-05 05:09:55,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:55,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682716506] [2021-06-05 05:09:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:55,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:55,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682716506] [2021-06-05 05:09:55,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682716506] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:55,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:55,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:09:55,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505336672] [2021-06-05 05:09:55,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:09:55,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:55,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:09:55,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:09:55,168 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:55,236 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2021-06-05 05:09:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:09:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:55,241 INFO L225 Difference]: With dead ends: 847 [2021-06-05 05:09:55,241 INFO L226 Difference]: Without dead ends: 827 [2021-06-05 05:09:55,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-05 05:09:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2021-06-05 05:09:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2021-06-05 05:09:55,260 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2021-06-05 05:09:55,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:55,260 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2021-06-05 05:09:55,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2021-06-05 05:09:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:55,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:55,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:55,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 05:09:55,264 INFO L430 AbstractCegarLoop]: === Iteration 10 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash 954675751, now seen corresponding path program 3 times [2021-06-05 05:09:55,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:55,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956865467] [2021-06-05 05:09:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:55,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:55,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956865467] [2021-06-05 05:09:55,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956865467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:55,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155629949] [2021-06-05 05:09:55,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:55,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:09:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:09:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:55,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155629949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:55,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:55,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:09:55,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237044476] [2021-06-05 05:09:55,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:09:55,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:09:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:09:55,451 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:55,532 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2021-06-05 05:09:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:09:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:55,538 INFO L225 Difference]: With dead ends: 857 [2021-06-05 05:09:55,538 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 05:09:55,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 05:09:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2021-06-05 05:09:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2021-06-05 05:09:55,554 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2021-06-05 05:09:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:55,554 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2021-06-05 05:09:55,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2021-06-05 05:09:55,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:55,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:55,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:55,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:09:55,780 INFO L430 AbstractCegarLoop]: === Iteration 11 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1922149633, now seen corresponding path program 5 times [2021-06-05 05:09:55,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:55,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674217849] [2021-06-05 05:09:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:55,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:55,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674217849] [2021-06-05 05:09:55,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674217849] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:55,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:55,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:09:55,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567954325] [2021-06-05 05:09:55,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:09:55,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:55,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:09:55,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:09:55,810 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:55,873 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2021-06-05 05:09:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:09:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:55,879 INFO L225 Difference]: With dead ends: 866 [2021-06-05 05:09:55,879 INFO L226 Difference]: Without dead ends: 842 [2021-06-05 05:09:55,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-05 05:09:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2021-06-05 05:09:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2021-06-05 05:09:55,897 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2021-06-05 05:09:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:55,897 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2021-06-05 05:09:55,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,897 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2021-06-05 05:09:55,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:55,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:55,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:55,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 05:09:55,900 INFO L430 AbstractCegarLoop]: === Iteration 12 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:55,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1932007235, now seen corresponding path program 4 times [2021-06-05 05:09:55,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:55,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133759886] [2021-06-05 05:09:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:55,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:55,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133759886] [2021-06-05 05:09:55,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133759886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:55,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53805490] [2021-06-05 05:09:55,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:55,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:55,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:55,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:09:55,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53805490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:56,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:56,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:09:56,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687691168] [2021-06-05 05:09:56,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:09:56,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:56,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:09:56,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:09:56,039 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:56,107 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2021-06-05 05:09:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:09:56,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:56,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:56,112 INFO L225 Difference]: With dead ends: 825 [2021-06-05 05:09:56,112 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 05:09:56,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 05:09:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2021-06-05 05:09:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2021-06-05 05:09:56,128 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2021-06-05 05:09:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:56,128 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2021-06-05 05:09:56,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2021-06-05 05:09:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:56,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:56,130 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:56,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:56,345 INFO L430 AbstractCegarLoop]: === Iteration 13 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:56,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1038354887, now seen corresponding path program 5 times [2021-06-05 05:09:56,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:56,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614792623] [2021-06-05 05:09:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:56,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614792623] [2021-06-05 05:09:56,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614792623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:56,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:56,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:09:56,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945875903] [2021-06-05 05:09:56,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:09:56,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:56,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:09:56,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:09:56,370 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:56,452 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2021-06-05 05:09:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:09:56,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:56,458 INFO L225 Difference]: With dead ends: 985 [2021-06-05 05:09:56,458 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 05:09:56,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:09:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 05:09:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2021-06-05 05:09:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2021-06-05 05:09:56,477 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2021-06-05 05:09:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:56,477 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2021-06-05 05:09:56,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2021-06-05 05:09:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:56,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:56,479 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:56,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 05:09:56,479 INFO L430 AbstractCegarLoop]: === Iteration 14 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:56,480 INFO L82 PathProgramCache]: Analyzing trace with hash 641401677, now seen corresponding path program 6 times [2021-06-05 05:09:56,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:56,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683675482] [2021-06-05 05:09:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:56,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683675482] [2021-06-05 05:09:56,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683675482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:56,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48981586] [2021-06-05 05:09:56,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:56,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:09:56,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:56,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:09:56,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48981586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:56,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:56,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:09:56,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750511547] [2021-06-05 05:09:56,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:09:56,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:56,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:09:56,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:09:56,597 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:56,650 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2021-06-05 05:09:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:09:56,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:56,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:56,654 INFO L225 Difference]: With dead ends: 783 [2021-06-05 05:09:56,654 INFO L226 Difference]: Without dead ends: 783 [2021-06-05 05:09:56,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-06-05 05:09:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2021-06-05 05:09:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2021-06-05 05:09:56,671 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2021-06-05 05:09:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:56,671 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2021-06-05 05:09:56,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2021-06-05 05:09:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:56,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:56,673 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:56,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:09:56,888 INFO L430 AbstractCegarLoop]: === Iteration 15 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:56,888 INFO L82 PathProgramCache]: Analyzing trace with hash 831548115, now seen corresponding path program 6 times [2021-06-05 05:09:56,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:56,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010342281] [2021-06-05 05:09:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:56,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010342281] [2021-06-05 05:09:56,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010342281] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:09:56,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:09:56,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:09:56,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030010467] [2021-06-05 05:09:56,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:09:56,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:56,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:09:56,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:09:56,909 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:56,987 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2021-06-05 05:09:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:09:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:56,991 INFO L225 Difference]: With dead ends: 597 [2021-06-05 05:09:56,991 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 05:09:56,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 05:09:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-06-05 05:09:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2021-06-05 05:09:57,008 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2021-06-05 05:09:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:57,008 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2021-06-05 05:09:57,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2021-06-05 05:09:57,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:09:57,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:57,010 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:57,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 05:09:57,010 INFO L430 AbstractCegarLoop]: === Iteration 16 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:57,011 INFO L82 PathProgramCache]: Analyzing trace with hash -293162627, now seen corresponding path program 7 times [2021-06-05 05:09:57,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:57,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855429935] [2021-06-05 05:09:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:57,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:57,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855429935] [2021-06-05 05:09:57,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855429935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:57,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649473733] [2021-06-05 05:09:57,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:09:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:57,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649473733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:57,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:57,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:09:57,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244324413] [2021-06-05 05:09:57,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:09:57,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:57,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:09:57,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:09:57,138 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:57,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:57,196 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2021-06-05 05:09:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:09:57,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:09:57,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:57,201 INFO L225 Difference]: With dead ends: 595 [2021-06-05 05:09:57,201 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 05:09:57,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:09:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 05:09:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2021-06-05 05:09:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2021-06-05 05:09:57,216 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2021-06-05 05:09:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:57,216 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2021-06-05 05:09:57,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2021-06-05 05:09:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:09:57,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:57,218 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:57,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:57,441 INFO L430 AbstractCegarLoop]: === Iteration 17 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:57,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1216404668, now seen corresponding path program 1 times [2021-06-05 05:09:57,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:57,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717059315] [2021-06-05 05:09:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:57,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:57,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717059315] [2021-06-05 05:09:57,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717059315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:57,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934530287] [2021-06-05 05:09:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:57,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:57,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:57,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:57,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:09:57,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:57,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:57,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:57,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:09:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:57,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934530287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:57,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:57,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:09:57,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758570289] [2021-06-05 05:09:57,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:09:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:09:57,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:09:57,928 INFO L87 Difference]: Start difference. First operand 487 states and 1762 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:58,297 INFO L93 Difference]: Finished difference Result 941 states and 3508 transitions. [2021-06-05 05:09:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:09:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:09:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:58,301 INFO L225 Difference]: With dead ends: 941 [2021-06-05 05:09:58,302 INFO L226 Difference]: Without dead ends: 860 [2021-06-05 05:09:58,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:09:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-06-05 05:09:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 547. [2021-06-05 05:09:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 3.6336996336996337) internal successors, (1984), 546 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1984 transitions. [2021-06-05 05:09:58,319 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1984 transitions. Word has length 26 [2021-06-05 05:09:58,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:58,320 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1984 transitions. [2021-06-05 05:09:58,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1984 transitions. [2021-06-05 05:09:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:09:58,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:58,322 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:58,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:09:58,545 INFO L430 AbstractCegarLoop]: === Iteration 18 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash 469022628, now seen corresponding path program 1 times [2021-06-05 05:09:58,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:58,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240034400] [2021-06-05 05:09:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:58,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:58,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240034400] [2021-06-05 05:09:58,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240034400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:58,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822178992] [2021-06-05 05:09:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:58,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:58,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:58,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:58,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:09:58,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:58,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:58,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:58,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:09:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:58,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822178992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:58,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:58,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:09:58,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054277674] [2021-06-05 05:09:58,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:09:58,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:58,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:09:58,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:09:58,938 INFO L87 Difference]: Start difference. First operand 547 states and 1984 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:59,283 INFO L93 Difference]: Finished difference Result 1017 states and 3788 transitions. [2021-06-05 05:09:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:09:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:09:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:59,287 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 05:09:59,287 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 05:09:59,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:09:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 05:09:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 569. [2021-06-05 05:09:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.653169014084507) internal successors, (2075), 568 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 2075 transitions. [2021-06-05 05:09:59,303 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 2075 transitions. Word has length 26 [2021-06-05 05:09:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:59,303 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 2075 transitions. [2021-06-05 05:09:59,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 2075 transitions. [2021-06-05 05:09:59,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:09:59,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:59,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:59,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:09:59,525 INFO L430 AbstractCegarLoop]: === Iteration 19 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:59,525 INFO L82 PathProgramCache]: Analyzing trace with hash -573555838, now seen corresponding path program 2 times [2021-06-05 05:09:59,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:59,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098320166] [2021-06-05 05:09:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:59,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:59,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098320166] [2021-06-05 05:09:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098320166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:59,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833599670] [2021-06-05 05:09:59,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:59,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:59,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:59,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:09:59,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:59,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:59,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:09:59,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:09:59,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:59,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:59,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:09:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:59,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833599670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:59,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:59,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:09:59,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131272206] [2021-06-05 05:09:59,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:09:59,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:59,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:09:59,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:09:59,893 INFO L87 Difference]: Start difference. First operand 569 states and 2075 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:01,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:01,027 INFO L93 Difference]: Finished difference Result 1392 states and 5274 transitions. [2021-06-05 05:10:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:10:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:01,038 INFO L225 Difference]: With dead ends: 1392 [2021-06-05 05:10:01,038 INFO L226 Difference]: Without dead ends: 1319 [2021-06-05 05:10:01,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:10:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-06-05 05:10:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 596. [2021-06-05 05:10:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.6621848739495797) internal successors, (2179), 595 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2179 transitions. [2021-06-05 05:10:01,059 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2179 transitions. Word has length 26 [2021-06-05 05:10:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:01,059 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 2179 transitions. [2021-06-05 05:10:01,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2179 transitions. [2021-06-05 05:10:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:01,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:01,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:01,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:01,281 INFO L430 AbstractCegarLoop]: === Iteration 20 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142914, now seen corresponding path program 3 times [2021-06-05 05:10:01,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:01,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703709717] [2021-06-05 05:10:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:01,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703709717] [2021-06-05 05:10:01,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703709717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862031086] [2021-06-05 05:10:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:01,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:01,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:01,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:01,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:01,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:01,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:01,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:01,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:01,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:01,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:01,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862031086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:01,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:01,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:01,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208549770] [2021-06-05 05:10:01,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:01,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:01,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:01,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:01,681 INFO L87 Difference]: Start difference. First operand 596 states and 2179 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:02,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:02,992 INFO L93 Difference]: Finished difference Result 1450 states and 5515 transitions. [2021-06-05 05:10:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:10:02,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:02,998 INFO L225 Difference]: With dead ends: 1450 [2021-06-05 05:10:02,999 INFO L226 Difference]: Without dead ends: 1367 [2021-06-05 05:10:02,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 952.5ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:10:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-05 05:10:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 594. [2021-06-05 05:10:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.6627318718381114) internal successors, (2172), 593 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 2172 transitions. [2021-06-05 05:10:03,020 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 2172 transitions. Word has length 26 [2021-06-05 05:10:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:03,020 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 2172 transitions. [2021-06-05 05:10:03,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 2172 transitions. [2021-06-05 05:10:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:03,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:03,022 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:03,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:03,245 INFO L430 AbstractCegarLoop]: === Iteration 21 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:03,246 INFO L82 PathProgramCache]: Analyzing trace with hash 730358562, now seen corresponding path program 2 times [2021-06-05 05:10:03,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:03,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131281754] [2021-06-05 05:10:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:03,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:03,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131281754] [2021-06-05 05:10:03,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131281754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234469609] [2021-06-05 05:10:03,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:03,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:03,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:03,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:03,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:03,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:03,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:03,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:03,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:03,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:03,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234469609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:03,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:03,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:03,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274016005] [2021-06-05 05:10:03,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:03,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:03,662 INFO L87 Difference]: Start difference. First operand 594 states and 2172 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:04,792 INFO L93 Difference]: Finished difference Result 2074 states and 7690 transitions. [2021-06-05 05:10:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:10:04,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:04,799 INFO L225 Difference]: With dead ends: 2074 [2021-06-05 05:10:04,799 INFO L226 Difference]: Without dead ends: 1801 [2021-06-05 05:10:04,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 846.0ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:10:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-06-05 05:10:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 663. [2021-06-05 05:10:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 3.7447129909365557) internal successors, (2479), 662 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 2479 transitions. [2021-06-05 05:10:04,837 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 2479 transitions. Word has length 26 [2021-06-05 05:10:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:04,838 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 2479 transitions. [2021-06-05 05:10:04,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 2479 transitions. [2021-06-05 05:10:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:04,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:04,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:05,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:10:05,065 INFO L430 AbstractCegarLoop]: === Iteration 22 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 197601580, now seen corresponding path program 3 times [2021-06-05 05:10:05,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:05,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787277968] [2021-06-05 05:10:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:05,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:05,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787277968] [2021-06-05 05:10:05,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787277968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:05,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487323769] [2021-06-05 05:10:05,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:05,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:05,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:05,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:05,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:05,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:05,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:05,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:05,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:05,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487323769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:05,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:05,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:05,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78191534] [2021-06-05 05:10:05,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:05,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:05,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:05,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:05,402 INFO L87 Difference]: Start difference. First operand 663 states and 2479 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:06,467 INFO L93 Difference]: Finished difference Result 2233 states and 8308 transitions. [2021-06-05 05:10:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:10:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:06,474 INFO L225 Difference]: With dead ends: 2233 [2021-06-05 05:10:06,474 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 05:10:06,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 783.1ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:10:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 05:10:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 704. [2021-06-05 05:10:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.8207681365576103) internal successors, (2686), 703 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2686 transitions. [2021-06-05 05:10:06,502 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2686 transitions. Word has length 26 [2021-06-05 05:10:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:06,502 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 2686 transitions. [2021-06-05 05:10:06,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2686 transitions. [2021-06-05 05:10:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:06,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:06,504 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:06,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:10:06,726 INFO L430 AbstractCegarLoop]: === Iteration 23 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1995337340, now seen corresponding path program 1 times [2021-06-05 05:10:06,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:06,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519945835] [2021-06-05 05:10:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:06,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:06,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519945835] [2021-06-05 05:10:06,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519945835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:06,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656600057] [2021-06-05 05:10:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:06,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:06,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:06,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:06,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:07,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656600057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:07,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:07,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:07,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799747455] [2021-06-05 05:10:07,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:07,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:07,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:07,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:07,013 INFO L87 Difference]: Start difference. First operand 704 states and 2686 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:07,267 INFO L93 Difference]: Finished difference Result 1073 states and 4116 transitions. [2021-06-05 05:10:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:07,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:07,270 INFO L225 Difference]: With dead ends: 1073 [2021-06-05 05:10:07,270 INFO L226 Difference]: Without dead ends: 1000 [2021-06-05 05:10:07,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-05 05:10:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 731. [2021-06-05 05:10:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.8273972602739725) internal successors, (2794), 730 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2794 transitions. [2021-06-05 05:10:07,288 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2794 transitions. Word has length 26 [2021-06-05 05:10:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:07,289 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2794 transitions. [2021-06-05 05:10:07,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2794 transitions. [2021-06-05 05:10:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:07,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:07,290 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:07,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:10:07,514 INFO L430 AbstractCegarLoop]: === Iteration 24 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:07,514 INFO L82 PathProgramCache]: Analyzing trace with hash -773558878, now seen corresponding path program 2 times [2021-06-05 05:10:07,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:07,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365526221] [2021-06-05 05:10:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:07,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:07,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365526221] [2021-06-05 05:10:07,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365526221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:07,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175189998] [2021-06-05 05:10:07,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:07,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:07,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:07,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:07,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:07,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:07,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:07,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:07,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:07,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:07,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 05:10:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:07,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175189998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:07,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:07,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:10:07,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888394008] [2021-06-05 05:10:07,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:07,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:07,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:07,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:07,950 INFO L87 Difference]: Start difference. First operand 731 states and 2794 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:08,586 INFO L93 Difference]: Finished difference Result 1158 states and 4457 transitions. [2021-06-05 05:10:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:10:08,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:08,590 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 05:10:08,590 INFO L226 Difference]: Without dead ends: 1083 [2021-06-05 05:10:08,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:10:08,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-06-05 05:10:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 727. [2021-06-05 05:10:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.8264462809917354) internal successors, (2778), 726 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2778 transitions. [2021-06-05 05:10:08,608 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2778 transitions. Word has length 26 [2021-06-05 05:10:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:08,609 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2778 transitions. [2021-06-05 05:10:08,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2778 transitions. [2021-06-05 05:10:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:08,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:08,610 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:08,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:08,833 INFO L430 AbstractCegarLoop]: === Iteration 25 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:08,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1010642212, now seen corresponding path program 1 times [2021-06-05 05:10:08,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:08,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395156028] [2021-06-05 05:10:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:08,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:08,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395156028] [2021-06-05 05:10:08,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395156028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:08,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235966145] [2021-06-05 05:10:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:08,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:08,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:09,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:09,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:09,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:09,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:09,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:09,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:09,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235966145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:09,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:09,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:09,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72665554] [2021-06-05 05:10:09,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:09,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:09,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:09,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:09,085 INFO L87 Difference]: Start difference. First operand 727 states and 2778 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:09,302 INFO L93 Difference]: Finished difference Result 1126 states and 4320 transitions. [2021-06-05 05:10:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:09,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:09,306 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 05:10:09,306 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 05:10:09,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 05:10:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 738. [2021-06-05 05:10:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.8317503392130257) internal successors, (2824), 737 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2824 transitions. [2021-06-05 05:10:09,324 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2824 transitions. Word has length 26 [2021-06-05 05:10:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:09,324 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2824 transitions. [2021-06-05 05:10:09,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,324 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2824 transitions. [2021-06-05 05:10:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:09,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:09,326 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:09,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:10:09,541 INFO L430 AbstractCegarLoop]: === Iteration 26 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash -390158146, now seen corresponding path program 2 times [2021-06-05 05:10:09,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:09,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421792037] [2021-06-05 05:10:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:09,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:09,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421792037] [2021-06-05 05:10:09,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421792037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:09,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915970905] [2021-06-05 05:10:09,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:09,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:09,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:09,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:09,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:09,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:09,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:09,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:09,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:09,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 05:10:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:09,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915970905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:09,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:09,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:10:09,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332133329] [2021-06-05 05:10:09,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:09,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:09,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:09,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:09,900 INFO L87 Difference]: Start difference. First operand 738 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:10,485 INFO L93 Difference]: Finished difference Result 1204 states and 4625 transitions. [2021-06-05 05:10:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:10:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:10,488 INFO L225 Difference]: With dead ends: 1204 [2021-06-05 05:10:10,488 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 05:10:10,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:10:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 05:10:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 736. [2021-06-05 05:10:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-06-05 05:10:10,506 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-06-05 05:10:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:10,506 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-06-05 05:10:10,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:10,506 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-06-05 05:10:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:10,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:10,508 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:10,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:10,725 INFO L430 AbstractCegarLoop]: === Iteration 27 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1105227200, now seen corresponding path program 3 times [2021-06-05 05:10:10,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:10,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538626969] [2021-06-05 05:10:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:10,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:10,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538626969] [2021-06-05 05:10:10,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538626969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:10,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330941746] [2021-06-05 05:10:10,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:10,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:10,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:10,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:10,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 05:10:10,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:10,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:10,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:10,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-05 05:10:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:11,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330941746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:11,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:11,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:10:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759246695] [2021-06-05 05:10:11,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:11,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:11,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:11,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:11,065 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:11,695 INFO L93 Difference]: Finished difference Result 1194 states and 4592 transitions. [2021-06-05 05:10:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:10:11,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:11,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:11,697 INFO L225 Difference]: With dead ends: 1194 [2021-06-05 05:10:11,697 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 05:10:11,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:10:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 05:10:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 760. [2021-06-05 05:10:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.8194993412384717) internal successors, (2899), 759 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2899 transitions. [2021-06-05 05:10:11,715 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2899 transitions. Word has length 26 [2021-06-05 05:10:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:11,715 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2899 transitions. [2021-06-05 05:10:11,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2899 transitions. [2021-06-05 05:10:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:11,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:11,717 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:11,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:10:11,939 INFO L430 AbstractCegarLoop]: === Iteration 28 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:11,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:11,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1970882652, now seen corresponding path program 3 times [2021-06-05 05:10:11,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:11,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795806029] [2021-06-05 05:10:11,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:12,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:12,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795806029] [2021-06-05 05:10:12,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795806029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:12,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494571090] [2021-06-05 05:10:12,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:12,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:12,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:12,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:12,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:12,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 05:10:12,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:12,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:12,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:12,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-05 05:10:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:12,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494571090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:12,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:12,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:10:12,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947416814] [2021-06-05 05:10:12,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:10:12,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:10:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:10:12,340 INFO L87 Difference]: Start difference. First operand 760 states and 2899 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:12,952 INFO L93 Difference]: Finished difference Result 1244 states and 4764 transitions. [2021-06-05 05:10:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:10:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:12,955 INFO L225 Difference]: With dead ends: 1244 [2021-06-05 05:10:12,955 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 05:10:12,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:10:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 05:10:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 736. [2021-06-05 05:10:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-06-05 05:10:12,977 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-06-05 05:10:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:12,977 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-06-05 05:10:12,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-06-05 05:10:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:12,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:12,978 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:13,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 05:10:13,179 INFO L430 AbstractCegarLoop]: === Iteration 29 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:13,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:13,179 INFO L82 PathProgramCache]: Analyzing trace with hash -248765392, now seen corresponding path program 4 times [2021-06-05 05:10:13,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:13,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496632520] [2021-06-05 05:10:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:13,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496632520] [2021-06-05 05:10:13,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496632520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081884627] [2021-06-05 05:10:13,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:13,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:13,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:13,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:13,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:13,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:13,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:13,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:13,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:13,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:13,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:10:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:13,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081884627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:13,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:13,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:13,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994567976] [2021-06-05 05:10:13,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:13,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:13,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:13,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:13,432 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:13,687 INFO L93 Difference]: Finished difference Result 1173 states and 4474 transitions. [2021-06-05 05:10:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:13,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:13,690 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 05:10:13,690 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 05:10:13,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:13,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 05:10:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 772. [2021-06-05 05:10:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-06-05 05:10:13,709 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-06-05 05:10:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:13,709 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-06-05 05:10:13,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-06-05 05:10:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:13,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:13,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:13,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 05:10:13,911 INFO L430 AbstractCegarLoop]: === Iteration 30 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash -959064550, now seen corresponding path program 4 times [2021-06-05 05:10:13,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:13,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144539607] [2021-06-05 05:10:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:14,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:14,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144539607] [2021-06-05 05:10:14,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144539607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:14,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117373099] [2021-06-05 05:10:14,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:14,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:14,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:14,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:14,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:14,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:14,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:10:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:14,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117373099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:14,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:14,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:14,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872139011] [2021-06-05 05:10:14,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:14,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:14,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:14,172 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:14,408 INFO L93 Difference]: Finished difference Result 1131 states and 4327 transitions. [2021-06-05 05:10:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:14,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:14,410 INFO L225 Difference]: With dead ends: 1131 [2021-06-05 05:10:14,410 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 05:10:14,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 05:10:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 772. [2021-06-05 05:10:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-06-05 05:10:14,426 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-06-05 05:10:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:14,426 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-06-05 05:10:14,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-06-05 05:10:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:14,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:14,428 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:14,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:10:14,636 INFO L430 AbstractCegarLoop]: === Iteration 31 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:14,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1223906964, now seen corresponding path program 5 times [2021-06-05 05:10:14,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:14,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693763599] [2021-06-05 05:10:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:14,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:14,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693763599] [2021-06-05 05:10:14,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693763599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:14,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083314299] [2021-06-05 05:10:14,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:14,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:14,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:14,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:14,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:14,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:14,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:14,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083314299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:14,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:14,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:14,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430791342] [2021-06-05 05:10:14,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:14,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:14,856 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:15,045 INFO L93 Difference]: Finished difference Result 1162 states and 4434 transitions. [2021-06-05 05:10:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:15,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:15,047 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 05:10:15,047 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 05:10:15,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 05:10:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 781. [2021-06-05 05:10:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.8205128205128207) internal successors, (2980), 780 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2980 transitions. [2021-06-05 05:10:15,063 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2980 transitions. Word has length 26 [2021-06-05 05:10:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:15,063 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2980 transitions. [2021-06-05 05:10:15,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2980 transitions. [2021-06-05 05:10:15,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:15,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:15,064 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:15,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:15,269 INFO L430 AbstractCegarLoop]: === Iteration 32 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1537433360, now seen corresponding path program 6 times [2021-06-05 05:10:15,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:15,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521165947] [2021-06-05 05:10:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:15,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:15,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521165947] [2021-06-05 05:10:15,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521165947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:15,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835130217] [2021-06-05 05:10:15,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:15,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:10:15,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:15,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:15,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:15,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:15,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:15,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:15,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:15,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835130217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:15,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:15,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:15,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120708034] [2021-06-05 05:10:15,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:15,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:15,588 INFO L87 Difference]: Start difference. First operand 781 states and 2980 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:16,333 INFO L93 Difference]: Finished difference Result 1321 states and 5044 transitions. [2021-06-05 05:10:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:16,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:16,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:16,336 INFO L225 Difference]: With dead ends: 1321 [2021-06-05 05:10:16,336 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 05:10:16,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 535.0ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:10:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 05:10:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 772. [2021-06-05 05:10:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-06-05 05:10:16,353 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-06-05 05:10:16,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:16,353 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-06-05 05:10:16,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-06-05 05:10:16,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:16,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:16,355 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:16,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:16,555 INFO L430 AbstractCegarLoop]: === Iteration 33 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:16,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1898034838, now seen corresponding path program 5 times [2021-06-05 05:10:16,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:16,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587270514] [2021-06-05 05:10:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:16,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:16,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587270514] [2021-06-05 05:10:16,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587270514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:16,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304627337] [2021-06-05 05:10:16,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:16,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:16,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:16,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:16,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:16,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:16,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:16,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:16,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:16,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:16,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:16,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304627337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:16,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:16,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:16,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061514269] [2021-06-05 05:10:16,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:16,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:16,797 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:17,056 INFO L93 Difference]: Finished difference Result 1118 states and 4279 transitions. [2021-06-05 05:10:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:17,058 INFO L225 Difference]: With dead ends: 1118 [2021-06-05 05:10:17,058 INFO L226 Difference]: Without dead ends: 1045 [2021-06-05 05:10:17,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-05 05:10:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 781. [2021-06-05 05:10:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.821794871794872) internal successors, (2981), 780 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2981 transitions. [2021-06-05 05:10:17,074 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2981 transitions. Word has length 26 [2021-06-05 05:10:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:17,074 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2981 transitions. [2021-06-05 05:10:17,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2981 transitions. [2021-06-05 05:10:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:17,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:17,076 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:17,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 05:10:17,293 INFO L430 AbstractCegarLoop]: === Iteration 34 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:17,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1441749820, now seen corresponding path program 6 times [2021-06-05 05:10:17,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:17,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413438626] [2021-06-05 05:10:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:17,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:17,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413438626] [2021-06-05 05:10:17,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413438626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:17,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249338518] [2021-06-05 05:10:17,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:17,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:10:17,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:17,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:17,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:17,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:17,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:17,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:17,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:17,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249338518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:17,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:17,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969172389] [2021-06-05 05:10:17,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:17,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:17,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:17,583 INFO L87 Difference]: Start difference. First operand 781 states and 2981 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:18,335 INFO L93 Difference]: Finished difference Result 1254 states and 4780 transitions. [2021-06-05 05:10:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:18,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:18,337 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 05:10:18,337 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 05:10:18,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:10:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 05:10:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 772. [2021-06-05 05:10:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-06-05 05:10:18,367 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-06-05 05:10:18,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:18,367 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-06-05 05:10:18,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-06-05 05:10:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:18,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:18,369 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:18,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:18,569 INFO L430 AbstractCegarLoop]: === Iteration 35 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1317477424, now seen corresponding path program 4 times [2021-06-05 05:10:18,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:18,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362263517] [2021-06-05 05:10:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:18,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:18,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362263517] [2021-06-05 05:10:18,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362263517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:18,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872998985] [2021-06-05 05:10:18,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:18,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:18,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:18,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:18,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:18,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:18,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:18,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:18,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:10:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:18,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872998985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:18,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:18,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:18,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582543798] [2021-06-05 05:10:18,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:18,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:18,847 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:19,175 INFO L93 Difference]: Finished difference Result 1441 states and 5439 transitions. [2021-06-05 05:10:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:10:19,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:19,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:19,178 INFO L225 Difference]: With dead ends: 1441 [2021-06-05 05:10:19,178 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 05:10:19,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:10:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 05:10:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 850. [2021-06-05 05:10:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.872791519434629) internal successors, (3288), 849 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 3288 transitions. [2021-06-05 05:10:19,197 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 3288 transitions. Word has length 26 [2021-06-05 05:10:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:19,197 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 3288 transitions. [2021-06-05 05:10:19,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 3288 transitions. [2021-06-05 05:10:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:19,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:19,199 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:19,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:10:19,409 INFO L430 AbstractCegarLoop]: === Iteration 36 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:19,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2027776582, now seen corresponding path program 4 times [2021-06-05 05:10:19,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:19,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400539837] [2021-06-05 05:10:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:19,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:19,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400539837] [2021-06-05 05:10:19,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400539837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:19,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917088896] [2021-06-05 05:10:19,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:19,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:19,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:19,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:19,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:19,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:19,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:19,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:19,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:19,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:19,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:10:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:19,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917088896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:19,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:19,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:19,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667613733] [2021-06-05 05:10:19,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:19,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:19,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:19,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:19,643 INFO L87 Difference]: Start difference. First operand 850 states and 3288 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:19,894 INFO L93 Difference]: Finished difference Result 1248 states and 4823 transitions. [2021-06-05 05:10:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:19,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:19,897 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 05:10:19,897 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 05:10:19,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 05:10:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 826. [2021-06-05 05:10:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.896969696969697) internal successors, (3215), 825 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 3215 transitions. [2021-06-05 05:10:19,914 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 3215 transitions. Word has length 26 [2021-06-05 05:10:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:19,914 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 3215 transitions. [2021-06-05 05:10:19,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 3215 transitions. [2021-06-05 05:10:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:19,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:19,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:20,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:10:20,133 INFO L430 AbstractCegarLoop]: === Iteration 37 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash -177742916, now seen corresponding path program 5 times [2021-06-05 05:10:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:20,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294030377] [2021-06-05 05:10:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:20,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:20,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294030377] [2021-06-05 05:10:20,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294030377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162775683] [2021-06-05 05:10:20,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:20,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:20,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:10:20,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:20,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:20,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:20,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:20,388 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-06-05 05:10:20,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:20,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:13 [2021-06-05 05:10:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:20,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162775683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:20,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:10:20,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829938207] [2021-06-05 05:10:20,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:20,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:20,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:20,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:20,441 INFO L87 Difference]: Start difference. First operand 826 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:20,825 INFO L93 Difference]: Finished difference Result 1332 states and 5148 transitions. [2021-06-05 05:10:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:10:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:20,827 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 05:10:20,827 INFO L226 Difference]: Without dead ends: 1241 [2021-06-05 05:10:20,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-05 05:10:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 844. [2021-06-05 05:10:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.9383155397390275) internal successors, (3320), 843 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 3320 transitions. [2021-06-05 05:10:20,844 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 3320 transitions. Word has length 26 [2021-06-05 05:10:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:20,844 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 3320 transitions. [2021-06-05 05:10:20,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 3320 transitions. [2021-06-05 05:10:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:20,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:20,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:21,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 05:10:21,063 INFO L430 AbstractCegarLoop]: === Iteration 38 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1790221484, now seen corresponding path program 6 times [2021-06-05 05:10:21,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:21,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51817053] [2021-06-05 05:10:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:21,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:21,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51817053] [2021-06-05 05:10:21,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51817053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:21,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44027010] [2021-06-05 05:10:21,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:21,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:21,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:21,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:21,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:21,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:21,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:21,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:21,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:21,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 05:10:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:21,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44027010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:21,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:21,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 05:10:21,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023604767] [2021-06-05 05:10:21,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:10:21,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:21,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:10:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:10:21,344 INFO L87 Difference]: Start difference. First operand 844 states and 3320 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:22,199 INFO L93 Difference]: Finished difference Result 1842 states and 7162 transitions. [2021-06-05 05:10:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:10:22,200 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:22,202 INFO L225 Difference]: With dead ends: 1842 [2021-06-05 05:10:22,202 INFO L226 Difference]: Without dead ends: 1679 [2021-06-05 05:10:22,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 620.5ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-06-05 05:10:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 868. [2021-06-05 05:10:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-05 05:10:22,221 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-05 05:10:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:22,222 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-05 05:10:22,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-05 05:10:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:22,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:22,224 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:22,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 05:10:22,431 INFO L430 AbstractCegarLoop]: === Iteration 39 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1647634560, now seen corresponding path program 5 times [2021-06-05 05:10:22,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:22,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073422383] [2021-06-05 05:10:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:22,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:22,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073422383] [2021-06-05 05:10:22,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073422383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:22,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196232359] [2021-06-05 05:10:22,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:22,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:22,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:22,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:22,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:22,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:22,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:22,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:22,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:22,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196232359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:22,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:22,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:22,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618408983] [2021-06-05 05:10:22,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:22,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:22,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:22,663 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:22,872 INFO L93 Difference]: Finished difference Result 1245 states and 4905 transitions. [2021-06-05 05:10:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:22,875 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 05:10:22,875 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 05:10:22,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 05:10:22,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 877. [2021-06-05 05:10:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.9817351598173514) internal successors, (3488), 876 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3488 transitions. [2021-06-05 05:10:22,891 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3488 transitions. Word has length 26 [2021-06-05 05:10:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:22,891 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3488 transitions. [2021-06-05 05:10:22,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3488 transitions. [2021-06-05 05:10:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:22,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:22,893 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:23,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:23,115 INFO L430 AbstractCegarLoop]: === Iteration 40 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash -881304204, now seen corresponding path program 6 times [2021-06-05 05:10:23,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:23,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480311008] [2021-06-05 05:10:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:23,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:23,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480311008] [2021-06-05 05:10:23,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480311008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:23,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570220853] [2021-06-05 05:10:23,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:23,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:23,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:23,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:23,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:23,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:23,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:23,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:23,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:23,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 05:10:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:23,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570220853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:23,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:23,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 05:10:23,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261878256] [2021-06-05 05:10:23,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:10:23,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:23,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:10:23,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:10:23,394 INFO L87 Difference]: Start difference. First operand 877 states and 3488 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:24,441 INFO L93 Difference]: Finished difference Result 1631 states and 6370 transitions. [2021-06-05 05:10:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:10:24,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:24,444 INFO L225 Difference]: With dead ends: 1631 [2021-06-05 05:10:24,444 INFO L226 Difference]: Without dead ends: 1558 [2021-06-05 05:10:24,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 796.8ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:10:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-06-05 05:10:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 868. [2021-06-05 05:10:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-05 05:10:24,458 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-05 05:10:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:24,458 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-05 05:10:24,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-05 05:10:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:24,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:24,460 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:24,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:24,660 INFO L430 AbstractCegarLoop]: === Iteration 41 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:24,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:24,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1976988362, now seen corresponding path program 7 times [2021-06-05 05:10:24,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:24,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12232671] [2021-06-05 05:10:24,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:24,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:24,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12232671] [2021-06-05 05:10:24,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12232671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:24,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424501275] [2021-06-05 05:10:24,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:24,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:24,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:24,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:10:24,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:24,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:24,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:24,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:10:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:24,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424501275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:24,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:24,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:10:24,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049196268] [2021-06-05 05:10:24,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:24,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:24,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:24,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:24,963 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:25,290 INFO L93 Difference]: Finished difference Result 1431 states and 5615 transitions. [2021-06-05 05:10:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:10:25,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:25,293 INFO L225 Difference]: With dead ends: 1431 [2021-06-05 05:10:25,293 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 05:10:25,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:10:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 05:10:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 910. [2021-06-05 05:10:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.957095709570957) internal successors, (3597), 909 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3597 transitions. [2021-06-05 05:10:25,315 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3597 transitions. Word has length 26 [2021-06-05 05:10:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:25,315 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3597 transitions. [2021-06-05 05:10:25,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3597 transitions. [2021-06-05 05:10:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:25,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:25,318 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:25,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:25,541 INFO L430 AbstractCegarLoop]: === Iteration 42 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash -632551638, now seen corresponding path program 7 times [2021-06-05 05:10:25,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:25,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197127618] [2021-06-05 05:10:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:25,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:25,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197127618] [2021-06-05 05:10:25,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197127618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:25,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063948115] [2021-06-05 05:10:25,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:25,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:25,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:25,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:25,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:10:25,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:25,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:25,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:25,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:10:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:25,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063948115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:25,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:25,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:10:25,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144929097] [2021-06-05 05:10:25,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:25,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:25,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:25,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:25,821 INFO L87 Difference]: Start difference. First operand 910 states and 3597 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:26,149 INFO L93 Difference]: Finished difference Result 1481 states and 5795 transitions. [2021-06-05 05:10:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:10:26,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:26,152 INFO L225 Difference]: With dead ends: 1481 [2021-06-05 05:10:26,152 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 05:10:26,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:10:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 05:10:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 880. [2021-06-05 05:10:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-06-05 05:10:26,167 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-06-05 05:10:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:26,167 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-06-05 05:10:26,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-06-05 05:10:26,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:26,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:26,168 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:26,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:10:26,369 INFO L430 AbstractCegarLoop]: === Iteration 43 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:26,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:26,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1675130104, now seen corresponding path program 8 times [2021-06-05 05:10:26,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:26,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607970900] [2021-06-05 05:10:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:26,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:26,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607970900] [2021-06-05 05:10:26,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607970900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:26,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955759811] [2021-06-05 05:10:26,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:26,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:26,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:26,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:26,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:26,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:26,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:26,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:26,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:26,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:26,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955759811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:26,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:26,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:26,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396461118] [2021-06-05 05:10:26,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:26,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:26,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:26,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:26,680 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:27,692 INFO L93 Difference]: Finished difference Result 1684 states and 6608 transitions. [2021-06-05 05:10:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:10:27,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:27,695 INFO L225 Difference]: With dead ends: 1684 [2021-06-05 05:10:27,695 INFO L226 Difference]: Without dead ends: 1611 [2021-06-05 05:10:27,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 733.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:10:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-06-05 05:10:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 889. [2021-06-05 05:10:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.975225225225225) internal successors, (3530), 888 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3530 transitions. [2021-06-05 05:10:27,711 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3530 transitions. Word has length 26 [2021-06-05 05:10:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:27,711 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3530 transitions. [2021-06-05 05:10:27,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3530 transitions. [2021-06-05 05:10:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:27,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:27,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:27,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:27,929 INFO L430 AbstractCegarLoop]: === Iteration 44 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:27,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1224250116, now seen corresponding path program 9 times [2021-06-05 05:10:27,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:27,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718627088] [2021-06-05 05:10:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:28,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:28,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718627088] [2021-06-05 05:10:28,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718627088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:28,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725305910] [2021-06-05 05:10:28,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:28,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:28,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:28,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:28,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:28,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:28,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:28,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:28,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725305910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:28,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:28,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:28,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835392515] [2021-06-05 05:10:28,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:28,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:28,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:28,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:28,254 INFO L87 Difference]: Start difference. First operand 889 states and 3530 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:29,302 INFO L93 Difference]: Finished difference Result 1684 states and 6639 transitions. [2021-06-05 05:10:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:10:29,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:29,305 INFO L225 Difference]: With dead ends: 1684 [2021-06-05 05:10:29,305 INFO L226 Difference]: Without dead ends: 1601 [2021-06-05 05:10:29,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 780.5ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:10:29,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-06-05 05:10:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 880. [2021-06-05 05:10:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-06-05 05:10:29,319 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-06-05 05:10:29,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:29,319 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-06-05 05:10:29,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-06-05 05:10:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:29,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:29,321 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:29,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 05:10:29,521 INFO L430 AbstractCegarLoop]: === Iteration 45 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:29,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:29,522 INFO L82 PathProgramCache]: Analyzing trace with hash -371215704, now seen corresponding path program 8 times [2021-06-05 05:10:29,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:29,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443371920] [2021-06-05 05:10:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:29,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:29,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443371920] [2021-06-05 05:10:29,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443371920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:29,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343757851] [2021-06-05 05:10:29,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:29,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:29,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:29,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:29,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:29,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:29,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:29,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:29,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:29,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:29,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343757851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:29,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:29,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:10:29,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401951741] [2021-06-05 05:10:29,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:10:29,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:29,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:10:29,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:10:29,846 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:31,007 INFO L93 Difference]: Finished difference Result 2501 states and 9470 transitions. [2021-06-05 05:10:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:10:31,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:31,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:31,011 INFO L225 Difference]: With dead ends: 2501 [2021-06-05 05:10:31,011 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 05:10:31,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 888.8ms TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:10:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 05:10:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 886. [2021-06-05 05:10:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.977401129943503) internal successors, (3520), 885 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3520 transitions. [2021-06-05 05:10:31,028 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3520 transitions. Word has length 26 [2021-06-05 05:10:31,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:31,028 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3520 transitions. [2021-06-05 05:10:31,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3520 transitions. [2021-06-05 05:10:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:31,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:31,029 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:31,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:31,230 INFO L430 AbstractCegarLoop]: === Iteration 46 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:31,230 INFO L82 PathProgramCache]: Analyzing trace with hash -903972686, now seen corresponding path program 9 times [2021-06-05 05:10:31,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:31,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239772876] [2021-06-05 05:10:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:31,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:31,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239772876] [2021-06-05 05:10:31,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239772876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:31,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564761746] [2021-06-05 05:10:31,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:31,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:31,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:31,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:31,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:31,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:31,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:31,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:31,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:31,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:31,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564761746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:31,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:31,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:10:31,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480744618] [2021-06-05 05:10:31,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:10:31,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:31,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:10:31,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:10:31,593 INFO L87 Difference]: Start difference. First operand 886 states and 3520 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:32,827 INFO L93 Difference]: Finished difference Result 2590 states and 9786 transitions. [2021-06-05 05:10:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:10:32,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:32,831 INFO L225 Difference]: With dead ends: 2590 [2021-06-05 05:10:32,832 INFO L226 Difference]: Without dead ends: 2318 [2021-06-05 05:10:32,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:10:32,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-06-05 05:10:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 871. [2021-06-05 05:10:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.9770114942528734) internal successors, (3460), 870 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3460 transitions. [2021-06-05 05:10:32,848 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3460 transitions. Word has length 26 [2021-06-05 05:10:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:32,849 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 3460 transitions. [2021-06-05 05:10:32,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3460 transitions. [2021-06-05 05:10:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:32,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:32,850 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:33,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:33,051 INFO L430 AbstractCegarLoop]: === Iteration 47 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:33,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:33,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2100006690, now seen corresponding path program 10 times [2021-06-05 05:10:33,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:33,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808756821] [2021-06-05 05:10:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:33,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:33,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808756821] [2021-06-05 05:10:33,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808756821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:33,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789123218] [2021-06-05 05:10:33,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:33,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:33,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:33,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:33,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:10:33,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:33,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:33,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:33,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:10:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:33,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789123218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:33,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:33,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:10:33,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698851815] [2021-06-05 05:10:33,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:33,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:33,337 INFO L87 Difference]: Start difference. First operand 871 states and 3460 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:33,839 INFO L93 Difference]: Finished difference Result 1975 states and 7789 transitions. [2021-06-05 05:10:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:10:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:33,842 INFO L225 Difference]: With dead ends: 1975 [2021-06-05 05:10:33,843 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 05:10:33,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 05:10:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 911. [2021-06-05 05:10:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.9472527472527474) internal successors, (3592), 910 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3592 transitions. [2021-06-05 05:10:33,859 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3592 transitions. Word has length 26 [2021-06-05 05:10:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:33,859 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3592 transitions. [2021-06-05 05:10:33,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3592 transitions. [2021-06-05 05:10:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:33,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:33,860 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:34,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 05:10:34,061 INFO L430 AbstractCegarLoop]: === Iteration 48 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:34,061 INFO L82 PathProgramCache]: Analyzing trace with hash -509533310, now seen corresponding path program 10 times [2021-06-05 05:10:34,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:34,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503940848] [2021-06-05 05:10:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:34,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:34,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503940848] [2021-06-05 05:10:34,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503940848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:34,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466305609] [2021-06-05 05:10:34,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:34,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:34,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:34,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:34,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:34,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:34,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:10:34,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:34,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:34,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:34,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:10:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:34,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466305609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:34,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:34,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:10:34,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609614333] [2021-06-05 05:10:34,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:34,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:34,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:34,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:34,349 INFO L87 Difference]: Start difference. First operand 911 states and 3592 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:34,758 INFO L93 Difference]: Finished difference Result 2026 states and 7973 transitions. [2021-06-05 05:10:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:10:34,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:34,762 INFO L225 Difference]: With dead ends: 2026 [2021-06-05 05:10:34,762 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 05:10:34,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 05:10:34,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 881. [2021-06-05 05:10:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.963636363636364) internal successors, (3488), 880 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3488 transitions. [2021-06-05 05:10:34,779 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3488 transitions. Word has length 26 [2021-06-05 05:10:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:34,779 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 3488 transitions. [2021-06-05 05:10:34,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3488 transitions. [2021-06-05 05:10:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:34,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:34,781 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:34,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:34,981 INFO L430 AbstractCegarLoop]: === Iteration 49 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:34,982 INFO L82 PathProgramCache]: Analyzing trace with hash -203283562, now seen corresponding path program 7 times [2021-06-05 05:10:34,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:34,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939113488] [2021-06-05 05:10:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:35,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:35,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939113488] [2021-06-05 05:10:35,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939113488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:35,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33549376] [2021-06-05 05:10:35,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:35,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:35,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:35,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:35,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:35,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:35,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:35,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:35,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:35,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33549376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:35,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:35,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:35,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713660756] [2021-06-05 05:10:35,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:35,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:35,224 INFO L87 Difference]: Start difference. First operand 881 states and 3488 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:35,562 INFO L93 Difference]: Finished difference Result 1346 states and 5309 transitions. [2021-06-05 05:10:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:10:35,563 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:35,565 INFO L225 Difference]: With dead ends: 1346 [2021-06-05 05:10:35,565 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 05:10:35,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 05:10:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 902. [2021-06-05 05:10:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9644839067702553) internal successors, (3572), 901 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3572 transitions. [2021-06-05 05:10:35,578 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3572 transitions. Word has length 26 [2021-06-05 05:10:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:35,579 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3572 transitions. [2021-06-05 05:10:35,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3572 transitions. [2021-06-05 05:10:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:35,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:35,580 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:35,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 05:10:35,782 INFO L430 AbstractCegarLoop]: === Iteration 50 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1322787516, now seen corresponding path program 8 times [2021-06-05 05:10:35,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:35,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265794788] [2021-06-05 05:10:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:35,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:35,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265794788] [2021-06-05 05:10:35,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265794788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414721622] [2021-06-05 05:10:35,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:35,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:35,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:35,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:35,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:35,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:35,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:35,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:36,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414721622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:36,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:36,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:36,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695995080] [2021-06-05 05:10:36,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:36,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:36,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:36,041 INFO L87 Difference]: Start difference. First operand 902 states and 3572 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:36,319 INFO L93 Difference]: Finished difference Result 1342 states and 5292 transitions. [2021-06-05 05:10:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:10:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:36,321 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 05:10:36,321 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 05:10:36,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:10:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 05:10:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 893. [2021-06-05 05:10:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-06-05 05:10:36,334 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-06-05 05:10:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:36,334 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-06-05 05:10:36,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-06-05 05:10:36,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:36,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:36,336 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:36,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:36,540 INFO L430 AbstractCegarLoop]: === Iteration 51 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1085704182, now seen corresponding path program 7 times [2021-06-05 05:10:36,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:36,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859277170] [2021-06-05 05:10:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:36,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:36,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859277170] [2021-06-05 05:10:36,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859277170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:36,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057202746] [2021-06-05 05:10:36,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:36,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:36,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:36,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:36,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:36,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:36,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:36,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:36,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:36,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057202746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:36,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:36,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:36,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410848574] [2021-06-05 05:10:36,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:36,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:36,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:36,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:36,788 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:37,126 INFO L93 Difference]: Finished difference Result 1390 states and 5478 transitions. [2021-06-05 05:10:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:10:37,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:37,130 INFO L225 Difference]: With dead ends: 1390 [2021-06-05 05:10:37,130 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 05:10:37,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 05:10:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 902. [2021-06-05 05:10:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9633740288568258) internal successors, (3571), 901 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3571 transitions. [2021-06-05 05:10:37,147 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3571 transitions. Word has length 26 [2021-06-05 05:10:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:37,147 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3571 transitions. [2021-06-05 05:10:37,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3571 transitions. [2021-06-05 05:10:37,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:37,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:37,149 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:37,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 05:10:37,365 INFO L430 AbstractCegarLoop]: === Iteration 52 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:37,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1706188248, now seen corresponding path program 8 times [2021-06-05 05:10:37,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:37,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818972254] [2021-06-05 05:10:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:37,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:37,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818972254] [2021-06-05 05:10:37,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818972254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:37,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575274377] [2021-06-05 05:10:37,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:37,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:37,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:37,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:37,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:37,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:37,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:37,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:37,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 05:10:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:37,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575274377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:37,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:37,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:10:37,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470957879] [2021-06-05 05:10:37,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:37,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:37,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:37,715 INFO L87 Difference]: Start difference. First operand 902 states and 3571 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:38,429 INFO L93 Difference]: Finished difference Result 1438 states and 5653 transitions. [2021-06-05 05:10:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:38,432 INFO L225 Difference]: With dead ends: 1438 [2021-06-05 05:10:38,432 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 05:10:38,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:10:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 05:10:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 893. [2021-06-05 05:10:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-06-05 05:10:38,445 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-06-05 05:10:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:38,445 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-06-05 05:10:38,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-06-05 05:10:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:38,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:38,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:38,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:38,647 INFO L430 AbstractCegarLoop]: === Iteration 53 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:38,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1093393702, now seen corresponding path program 9 times [2021-06-05 05:10:38,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:38,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537400915] [2021-06-05 05:10:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:38,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:38,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537400915] [2021-06-05 05:10:38,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537400915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:38,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029780489] [2021-06-05 05:10:38,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:38,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:38,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:38,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:38,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:10:38,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:38,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:38,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:38,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:10:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:38,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029780489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:38,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:38,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:38,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005876804] [2021-06-05 05:10:38,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:38,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:38,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:38,913 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:39,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:39,289 INFO L93 Difference]: Finished difference Result 1359 states and 5336 transitions. [2021-06-05 05:10:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:10:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:39,291 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 05:10:39,291 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 05:10:39,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:10:39,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 05:10:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 917. [2021-06-05 05:10:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.947598253275109) internal successors, (3616), 916 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 3616 transitions. [2021-06-05 05:10:39,313 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 3616 transitions. Word has length 26 [2021-06-05 05:10:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:39,313 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 3616 transitions. [2021-06-05 05:10:39,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 3616 transitions. [2021-06-05 05:10:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:39,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:39,316 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:39,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:39,537 INFO L430 AbstractCegarLoop]: === Iteration 54 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash -227738250, now seen corresponding path program 9 times [2021-06-05 05:10:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:39,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086767901] [2021-06-05 05:10:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:39,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:39,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086767901] [2021-06-05 05:10:39,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086767901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:39,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205259411] [2021-06-05 05:10:39,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:39,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:39,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:39,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:39,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:39,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:39,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:10:39,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:39,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:39,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:39,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:10:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:39,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205259411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:39,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:39,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:10:39,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737045619] [2021-06-05 05:10:39,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:39,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:39,795 INFO L87 Difference]: Start difference. First operand 917 states and 3616 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:40,087 INFO L93 Difference]: Finished difference Result 1400 states and 5483 transitions. [2021-06-05 05:10:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:10:40,087 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:40,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:40,090 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 05:10:40,090 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 05:10:40,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:10:40,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 05:10:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 884. [2021-06-05 05:10:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-06-05 05:10:40,103 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-06-05 05:10:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:40,103 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-06-05 05:10:40,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-06-05 05:10:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:40,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:40,105 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:40,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 05:10:40,321 INFO L430 AbstractCegarLoop]: === Iteration 55 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash -55965950, now seen corresponding path program 10 times [2021-06-05 05:10:40,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:40,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77030330] [2021-06-05 05:10:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:40,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:40,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77030330] [2021-06-05 05:10:40,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77030330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:40,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834729758] [2021-06-05 05:10:40,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:40,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:40,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:40,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:40,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:10:40,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:40,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:40,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:40,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:10:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:40,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834729758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:40,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:40,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:10:40,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776373258] [2021-06-05 05:10:40,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:40,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:40,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:40,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:40,567 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:40,925 INFO L93 Difference]: Finished difference Result 1728 states and 6709 transitions. [2021-06-05 05:10:40,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:10:40,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:40,928 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 05:10:40,928 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 05:10:40,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 05:10:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 916. [2021-06-05 05:10:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.9366120218579237) internal successors, (3602), 915 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3602 transitions. [2021-06-05 05:10:40,948 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3602 transitions. Word has length 26 [2021-06-05 05:10:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:40,948 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3602 transitions. [2021-06-05 05:10:40,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3602 transitions. [2021-06-05 05:10:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:40,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:40,951 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:41,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:41,173 INFO L430 AbstractCegarLoop]: === Iteration 56 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1629461346, now seen corresponding path program 10 times [2021-06-05 05:10:41,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:41,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006424521] [2021-06-05 05:10:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:41,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:41,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006424521] [2021-06-05 05:10:41,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006424521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:41,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612296399] [2021-06-05 05:10:41,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:41,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:41,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:41,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:41,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:41,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:41,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:10:41,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:41,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:41,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:41,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:10:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:41,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612296399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:41,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:41,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:10:41,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078245569] [2021-06-05 05:10:41,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:41,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:41,432 INFO L87 Difference]: Start difference. First operand 916 states and 3602 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:41,805 INFO L93 Difference]: Finished difference Result 1770 states and 6860 transitions. [2021-06-05 05:10:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:10:41,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:41,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:41,809 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 05:10:41,809 INFO L226 Difference]: Without dead ends: 1699 [2021-06-05 05:10:41,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:41,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-06-05 05:10:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 884. [2021-06-05 05:10:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-06-05 05:10:41,824 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-06-05 05:10:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:41,824 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-06-05 05:10:41,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-06-05 05:10:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:41,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:41,825 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:42,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 05:10:42,031 INFO L430 AbstractCegarLoop]: === Iteration 57 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:42,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1871455264, now seen corresponding path program 11 times [2021-06-05 05:10:42,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:42,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551300485] [2021-06-05 05:10:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:42,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:42,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551300485] [2021-06-05 05:10:42,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551300485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575505793] [2021-06-05 05:10:42,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:42,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:42,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:42,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:42,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:42,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:42,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:42,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:42,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:42,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:42,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:10:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:42,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575505793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:42,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:10:42,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626687517] [2021-06-05 05:10:42,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:42,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:42,289 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:42,526 INFO L93 Difference]: Finished difference Result 1351 states and 5290 transitions. [2021-06-05 05:10:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:42,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:42,529 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 05:10:42,530 INFO L226 Difference]: Without dead ends: 1270 [2021-06-05 05:10:42,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:10:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-06-05 05:10:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 923. [2021-06-05 05:10:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.9425162689804774) internal successors, (3635), 922 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3635 transitions. [2021-06-05 05:10:42,548 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3635 transitions. Word has length 26 [2021-06-05 05:10:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:42,548 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3635 transitions. [2021-06-05 05:10:42,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3635 transitions. [2021-06-05 05:10:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:42,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:42,550 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:42,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:42,774 INFO L430 AbstractCegarLoop]: === Iteration 58 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:42,774 INFO L82 PathProgramCache]: Analyzing trace with hash -186027968, now seen corresponding path program 11 times [2021-06-05 05:10:42,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:42,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25330261] [2021-06-05 05:10:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:42,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:42,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25330261] [2021-06-05 05:10:42,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25330261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295573524] [2021-06-05 05:10:42,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:42,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:42,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:42,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:42,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:42,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:42,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:42,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:42,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:42,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:42,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 05:10:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:43,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295573524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:43,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:43,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 05:10:43,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056379270] [2021-06-05 05:10:43,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:43,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:43,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:43,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:43,020 INFO L87 Difference]: Start difference. First operand 923 states and 3635 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:43,521 INFO L93 Difference]: Finished difference Result 1488 states and 5810 transitions. [2021-06-05 05:10:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:10:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:43,524 INFO L225 Difference]: With dead ends: 1488 [2021-06-05 05:10:43,524 INFO L226 Difference]: Without dead ends: 1407 [2021-06-05 05:10:43,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:10:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-05 05:10:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 893. [2021-06-05 05:10:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.958520179372197) internal successors, (3531), 892 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3531 transitions. [2021-06-05 05:10:43,542 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3531 transitions. Word has length 26 [2021-06-05 05:10:43,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:43,542 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3531 transitions. [2021-06-05 05:10:43,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3531 transitions. [2021-06-05 05:10:43,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:43,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:43,545 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:43,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:10:43,768 INFO L430 AbstractCegarLoop]: === Iteration 59 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:43,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1228606434, now seen corresponding path program 12 times [2021-06-05 05:10:43,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:43,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260189334] [2021-06-05 05:10:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:43,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260189334] [2021-06-05 05:10:43,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260189334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640071552] [2021-06-05 05:10:43,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:43,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:43,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:43,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:43,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:43,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:43,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:43,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:43,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:43,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:44,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640071552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:44,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:44,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:44,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88277720] [2021-06-05 05:10:44,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:44,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:44,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:44,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:44,116 INFO L87 Difference]: Start difference. First operand 893 states and 3531 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:46,040 INFO L93 Difference]: Finished difference Result 2041 states and 7758 transitions. [2021-06-05 05:10:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:10:46,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:46,044 INFO L225 Difference]: With dead ends: 2041 [2021-06-05 05:10:46,044 INFO L226 Difference]: Without dead ends: 1882 [2021-06-05 05:10:46,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1442.2ms TimeCoverageRelationStatistics Valid=641, Invalid=2551, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:10:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-06-05 05:10:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 928. [2021-06-05 05:10:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.95361380798274) internal successors, (3665), 927 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3665 transitions. [2021-06-05 05:10:46,060 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3665 transitions. Word has length 26 [2021-06-05 05:10:46,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:46,060 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3665 transitions. [2021-06-05 05:10:46,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3665 transitions. [2021-06-05 05:10:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:46,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:46,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:46,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:46,270 INFO L430 AbstractCegarLoop]: === Iteration 60 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:46,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1670773786, now seen corresponding path program 13 times [2021-06-05 05:10:46,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:46,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307262262] [2021-06-05 05:10:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:46,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:46,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307262262] [2021-06-05 05:10:46,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307262262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:46,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709395811] [2021-06-05 05:10:46,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:46,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:46,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:46,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:46,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:46,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:46,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:46,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:46,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709395811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:46,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:46,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:46,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573968188] [2021-06-05 05:10:46,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:46,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:46,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:46,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:46,486 INFO L87 Difference]: Start difference. First operand 928 states and 3665 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:46,714 INFO L93 Difference]: Finished difference Result 1338 states and 5244 transitions. [2021-06-05 05:10:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:46,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:46,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:46,716 INFO L225 Difference]: With dead ends: 1338 [2021-06-05 05:10:46,716 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 05:10:46,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 05:10:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 925. [2021-06-05 05:10:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.955627705627706) internal successors, (3655), 924 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 3655 transitions. [2021-06-05 05:10:46,729 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 3655 transitions. Word has length 26 [2021-06-05 05:10:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:46,729 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 3655 transitions. [2021-06-05 05:10:46,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 3655 transitions. [2021-06-05 05:10:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:46,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:46,731 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:46,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:46,932 INFO L430 AbstractCegarLoop]: === Iteration 61 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:46,932 INFO L82 PathProgramCache]: Analyzing trace with hash 75307966, now seen corresponding path program 12 times [2021-06-05 05:10:46,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:46,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159825802] [2021-06-05 05:10:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:47,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:47,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159825802] [2021-06-05 05:10:47,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159825802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:47,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599140630] [2021-06-05 05:10:47,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:47,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:10:47,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:47,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:47,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:47,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:47,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:47,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:47,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:47,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:47,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:47,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599140630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:47,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:47,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622185186] [2021-06-05 05:10:47,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:47,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:47,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:47,262 INFO L87 Difference]: Start difference. First operand 925 states and 3655 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:48,001 INFO L93 Difference]: Finished difference Result 2198 states and 8311 transitions. [2021-06-05 05:10:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:10:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:48,005 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 05:10:48,005 INFO L226 Difference]: Without dead ends: 1925 [2021-06-05 05:10:48,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 577.9ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:10:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-06-05 05:10:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 925. [2021-06-05 05:10:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.955627705627706) internal successors, (3655), 924 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 3655 transitions. [2021-06-05 05:10:48,020 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 3655 transitions. Word has length 26 [2021-06-05 05:10:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:48,021 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 3655 transitions. [2021-06-05 05:10:48,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 3655 transitions. [2021-06-05 05:10:48,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:48,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:48,022 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:48,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 05:10:48,225 INFO L430 AbstractCegarLoop]: === Iteration 62 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -457449016, now seen corresponding path program 13 times [2021-06-05 05:10:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:48,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331550831] [2021-06-05 05:10:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:48,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:48,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331550831] [2021-06-05 05:10:48,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331550831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:48,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063712065] [2021-06-05 05:10:48,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:48,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:48,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:48,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:48,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:48,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:48,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063712065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:48,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:48,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:48,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067887806] [2021-06-05 05:10:48,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:48,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:48,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:48,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:48,439 INFO L87 Difference]: Start difference. First operand 925 states and 3655 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:48,748 INFO L93 Difference]: Finished difference Result 1457 states and 5683 transitions. [2021-06-05 05:10:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:10:48,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:48,751 INFO L225 Difference]: With dead ends: 1457 [2021-06-05 05:10:48,751 INFO L226 Difference]: Without dead ends: 1367 [2021-06-05 05:10:48,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:10:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-05 05:10:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 922. [2021-06-05 05:10:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 05:10:48,770 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 05:10:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:48,770 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 05:10:48,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 05:10:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:48,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:48,773 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:48,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:48,995 INFO L430 AbstractCegarLoop]: === Iteration 63 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:48,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1340286744, now seen corresponding path program 11 times [2021-06-05 05:10:48,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:48,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059876953] [2021-06-05 05:10:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:49,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:49,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059876953] [2021-06-05 05:10:49,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059876953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:49,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011982171] [2021-06-05 05:10:49,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:49,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:49,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:49,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:49,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:49,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:49,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:49,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:49,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:49,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011982171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:49,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:49,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:49,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610722653] [2021-06-05 05:10:49,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:49,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:49,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:49,218 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:49,502 INFO L93 Difference]: Finished difference Result 1298 states and 5098 transitions. [2021-06-05 05:10:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:49,505 INFO L225 Difference]: With dead ends: 1298 [2021-06-05 05:10:49,505 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 05:10:49,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 05:10:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 940. [2021-06-05 05:10:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-06-05 05:10:49,523 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-06-05 05:10:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:49,523 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-06-05 05:10:49,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-06-05 05:10:49,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:49,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:49,526 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:49,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 05:10:49,749 INFO L430 AbstractCegarLoop]: === Iteration 64 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1428609474, now seen corresponding path program 12 times [2021-06-05 05:10:49,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:49,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368715958] [2021-06-05 05:10:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:49,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:49,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368715958] [2021-06-05 05:10:49,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368715958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:49,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856591632] [2021-06-05 05:10:49,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:49,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:49,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:49,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:49,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:49,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:49,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:49,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:49,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:49,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:49,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 05:10:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:50,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856591632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:50,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:50,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 05:10:50,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172173454] [2021-06-05 05:10:50,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:10:50,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:50,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:10:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:10:50,015 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:50,928 INFO L93 Difference]: Finished difference Result 1722 states and 6769 transitions. [2021-06-05 05:10:50,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:10:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:50,931 INFO L225 Difference]: With dead ends: 1722 [2021-06-05 05:10:50,931 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 05:10:50,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:10:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 05:10:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 931. [2021-06-05 05:10:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 05:10:50,946 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 05:10:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:50,946 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 05:10:50,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 05:10:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:50,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:50,948 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:51,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:10:51,157 INFO L430 AbstractCegarLoop]: === Iteration 65 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1665692808, now seen corresponding path program 11 times [2021-06-05 05:10:51,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:51,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373321716] [2021-06-05 05:10:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:51,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:51,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373321716] [2021-06-05 05:10:51,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373321716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:51,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336235572] [2021-06-05 05:10:51,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:51,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:51,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:51,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,340 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-06-05 05:10:51,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:13 [2021-06-05 05:10:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:51,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336235572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:51,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:51,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:10:51,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509675436] [2021-06-05 05:10:51,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:51,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:51,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:51,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:51,384 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:51,677 INFO L93 Difference]: Finished difference Result 1339 states and 5257 transitions. [2021-06-05 05:10:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:51,680 INFO L225 Difference]: With dead ends: 1339 [2021-06-05 05:10:51,680 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 05:10:51,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:10:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 05:10:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 940. [2021-06-05 05:10:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-06-05 05:10:51,693 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-06-05 05:10:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:51,693 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-06-05 05:10:51,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-06-05 05:10:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:51,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:51,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:51,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:10:51,895 INFO L430 AbstractCegarLoop]: === Iteration 66 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1045208742, now seen corresponding path program 12 times [2021-06-05 05:10:51,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:51,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140580860] [2021-06-05 05:10:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:51,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140580860] [2021-06-05 05:10:51,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140580860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098534808] [2021-06-05 05:10:51,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:51,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:10:51,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:52,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:52,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:52,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:52,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:52,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:52,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 05:10:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098534808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:52,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:52,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 05:10:52,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347172738] [2021-06-05 05:10:52,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:10:52,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:52,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:10:52,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:10:52,130 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:52,551 INFO L93 Difference]: Finished difference Result 1443 states and 5632 transitions. [2021-06-05 05:10:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:10:52,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:52,553 INFO L225 Difference]: With dead ends: 1443 [2021-06-05 05:10:52,554 INFO L226 Difference]: Without dead ends: 1370 [2021-06-05 05:10:52,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:10:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-05 05:10:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 931. [2021-06-05 05:10:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 05:10:52,570 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 05:10:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:52,570 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 05:10:52,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 05:10:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:52,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:52,572 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:52,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 05:10:52,777 INFO L430 AbstractCegarLoop]: === Iteration 67 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash 450176604, now seen corresponding path program 13 times [2021-06-05 05:10:52,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:52,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27574621] [2021-06-05 05:10:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:52,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:52,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27574621] [2021-06-05 05:10:52,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27574621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:52,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465887550] [2021-06-05 05:10:52,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:52,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:52,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:52,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:52,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:52,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:52,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:52,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:52,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:10:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:52,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465887550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:52,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:52,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:52,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559489810] [2021-06-05 05:10:52,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:52,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:52,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:52,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:52,976 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:53,218 INFO L93 Difference]: Finished difference Result 1323 states and 5177 transitions. [2021-06-05 05:10:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:53,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:53,221 INFO L225 Difference]: With dead ends: 1323 [2021-06-05 05:10:53,221 INFO L226 Difference]: Without dead ends: 1252 [2021-06-05 05:10:53,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-06-05 05:10:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 955. [2021-06-05 05:10:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.9454926624737947) internal successors, (3764), 954 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3764 transitions. [2021-06-05 05:10:53,233 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3764 transitions. Word has length 26 [2021-06-05 05:10:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:53,233 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3764 transitions. [2021-06-05 05:10:53,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3764 transitions. [2021-06-05 05:10:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:53,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:53,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:53,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:53,436 INFO L430 AbstractCegarLoop]: === Iteration 68 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:53,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:53,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1315832056, now seen corresponding path program 13 times [2021-06-05 05:10:53,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:53,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656215715] [2021-06-05 05:10:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:53,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:53,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656215715] [2021-06-05 05:10:53,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656215715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:53,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304123039] [2021-06-05 05:10:53,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:53,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:53,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:53,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:53,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:53,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:53,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:53,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:10:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:53,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304123039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:53,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:53,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:10:53,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688293671] [2021-06-05 05:10:53,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:10:53,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:53,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:10:53,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:10:53,644 INFO L87 Difference]: Start difference. First operand 955 states and 3764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:53,850 INFO L93 Difference]: Finished difference Result 1359 states and 5303 transitions. [2021-06-05 05:10:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:53,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:53,852 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 05:10:53,852 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 05:10:53,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:10:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 05:10:53,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 922. [2021-06-05 05:10:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 05:10:53,864 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 05:10:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:53,864 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 05:10:53,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 05:10:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:53,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:53,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:54,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:10:54,067 INFO L430 AbstractCegarLoop]: === Iteration 69 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash -903815988, now seen corresponding path program 14 times [2021-06-05 05:10:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:54,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249816229] [2021-06-05 05:10:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:54,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249816229] [2021-06-05 05:10:54,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249816229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892696332] [2021-06-05 05:10:54,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:54,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:54,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:54,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:54,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:54,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:54,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:54,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:54,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:54,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:54,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 05:10:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:54,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892696332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:54,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:54,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:54,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568909175] [2021-06-05 05:10:54,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:54,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:54,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:54,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:54,334 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:55,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:55,101 INFO L93 Difference]: Finished difference Result 1718 states and 6716 transitions. [2021-06-05 05:10:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:10:55,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:55,104 INFO L225 Difference]: With dead ends: 1718 [2021-06-05 05:10:55,104 INFO L226 Difference]: Without dead ends: 1645 [2021-06-05 05:10:55,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-06-05 05:10:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 958. [2021-06-05 05:10:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.941483803552769) internal successors, (3772), 957 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3772 transitions. [2021-06-05 05:10:55,118 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3772 transitions. Word has length 26 [2021-06-05 05:10:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:55,118 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3772 transitions. [2021-06-05 05:10:55,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3772 transitions. [2021-06-05 05:10:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:55,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:55,120 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:55,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:55,321 INFO L430 AbstractCegarLoop]: === Iteration 70 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:55,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:55,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1614115146, now seen corresponding path program 14 times [2021-06-05 05:10:55,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:55,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560074271] [2021-06-05 05:10:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:55,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:55,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560074271] [2021-06-05 05:10:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560074271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:55,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356953177] [2021-06-05 05:10:55,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:55,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:55,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:55,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:55,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:55,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:55,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:55,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:55,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:55,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 05:10:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:55,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356953177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:55,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:55,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:55,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456996603] [2021-06-05 05:10:55,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:55,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:55,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:55,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:55,619 INFO L87 Difference]: Start difference. First operand 958 states and 3772 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:56,381 INFO L93 Difference]: Finished difference Result 1671 states and 6552 transitions. [2021-06-05 05:10:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:10:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:56,384 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 05:10:56,384 INFO L226 Difference]: Without dead ends: 1598 [2021-06-05 05:10:56,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-06-05 05:10:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 931. [2021-06-05 05:10:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 05:10:56,398 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 05:10:56,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:56,399 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 05:10:56,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 05:10:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:56,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:56,400 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:56,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 05:10:56,601 INFO L430 AbstractCegarLoop]: === Iteration 71 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:56,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1878957560, now seen corresponding path program 15 times [2021-06-05 05:10:56,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:56,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511903870] [2021-06-05 05:10:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:56,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511903870] [2021-06-05 05:10:56,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511903870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035625733] [2021-06-05 05:10:56,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:56,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:56,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:56,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:56,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:56,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:56,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:56,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:56,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:56,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035625733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:56,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:56,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709951382] [2021-06-05 05:10:56,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:56,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:56,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:56,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:56,847 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:57,879 INFO L93 Difference]: Finished difference Result 1783 states and 6937 transitions. [2021-06-05 05:10:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:10:57,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:57,882 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 05:10:57,882 INFO L226 Difference]: Without dead ends: 1710 [2021-06-05 05:10:57,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 752.6ms TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:10:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-06-05 05:10:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 940. [2021-06-05 05:10:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-06-05 05:10:57,901 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-06-05 05:10:57,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:57,901 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-06-05 05:10:57,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,902 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-06-05 05:10:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:57,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:57,904 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:58,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:58,117 INFO L430 AbstractCegarLoop]: === Iteration 72 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:58,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:58,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2102483340, now seen corresponding path program 16 times [2021-06-05 05:10:58,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:58,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475600914] [2021-06-05 05:10:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:58,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:58,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475600914] [2021-06-05 05:10:58,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475600914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:58,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104544966] [2021-06-05 05:10:58,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:58,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:58,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:58,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:10:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:58,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:58,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:10:58,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:58,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:58,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:58,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:10:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:58,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104544966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:58,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:58,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:10:58,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824030687] [2021-06-05 05:10:58,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:10:58,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:58,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:10:58,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:10:58,330 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:58,562 INFO L93 Difference]: Finished difference Result 1357 states and 5334 transitions. [2021-06-05 05:10:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:10:58,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:58,564 INFO L225 Difference]: With dead ends: 1357 [2021-06-05 05:10:58,564 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 05:10:58,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 05:10:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 931. [2021-06-05 05:10:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 05:10:58,578 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 05:10:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:58,578 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 05:10:58,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 05:10:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:58,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:58,579 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:58,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:10:58,780 INFO L430 AbstractCegarLoop]: === Iteration 73 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:58,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1242984242, now seen corresponding path program 15 times [2021-06-05 05:10:58,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:58,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747069591] [2021-06-05 05:10:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:58,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:58,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747069591] [2021-06-05 05:10:58,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747069591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:58,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463325303] [2021-06-05 05:10:58,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:58,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:10:58,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:58,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:10:58,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:58,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:58,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:10:58,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:58,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:58,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:58,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:10:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:59,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463325303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:59,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:59,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:10:59,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348508822] [2021-06-05 05:10:59,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:10:59,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:59,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:10:59,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:10:59,064 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:59,921 INFO L93 Difference]: Finished difference Result 1660 states and 6502 transitions. [2021-06-05 05:10:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:10:59,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:10:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:59,924 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 05:10:59,924 INFO L226 Difference]: Without dead ends: 1587 [2021-06-05 05:10:59,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:10:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-06-05 05:10:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 940. [2021-06-05 05:10:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:59,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-06-05 05:10:59,938 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-06-05 05:10:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:59,938 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-06-05 05:10:59,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:59,938 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-06-05 05:10:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:10:59,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:59,939 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:00,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 05:11:00,140 INFO L430 AbstractCegarLoop]: === Iteration 74 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:00,140 INFO L82 PathProgramCache]: Analyzing trace with hash 786699224, now seen corresponding path program 16 times [2021-06-05 05:11:00,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:00,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854559531] [2021-06-05 05:11:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:00,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:00,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854559531] [2021-06-05 05:11:00,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854559531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:00,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499963709] [2021-06-05 05:11:00,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:00,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:00,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:00,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:00,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:00,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:00,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:00,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:00,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:00,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:00,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:11:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:00,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499963709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:00,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:00,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:00,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033823154] [2021-06-05 05:11:00,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:00,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:00,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:00,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:00,336 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:00,551 INFO L93 Difference]: Finished difference Result 1301 states and 5111 transitions. [2021-06-05 05:11:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:00,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:00,554 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 05:11:00,554 INFO L226 Difference]: Without dead ends: 1226 [2021-06-05 05:11:00,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-06-05 05:11:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 922. [2021-06-05 05:11:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 05:11:00,566 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 05:11:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:00,566 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 05:11:00,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 05:11:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:00,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:00,567 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:00,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 05:11:00,768 INFO L430 AbstractCegarLoop]: === Iteration 75 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:00,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1972528020, now seen corresponding path program 14 times [2021-06-05 05:11:00,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:00,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437703104] [2021-06-05 05:11:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:00,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:00,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437703104] [2021-06-05 05:11:00,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437703104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:00,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245463435] [2021-06-05 05:11:00,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:00,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:00,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:00,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:00,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:00,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:00,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:11:00,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:00,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:00,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:00,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:11:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:01,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245463435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:01,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:01,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:01,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13899908] [2021-06-05 05:11:01,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:01,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:01,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:01,042 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:01,428 INFO L93 Difference]: Finished difference Result 1634 states and 6315 transitions. [2021-06-05 05:11:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:11:01,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:01,431 INFO L225 Difference]: With dead ends: 1634 [2021-06-05 05:11:01,431 INFO L226 Difference]: Without dead ends: 1543 [2021-06-05 05:11:01,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:11:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-05 05:11:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 964. [2021-06-05 05:11:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.936656282450675) internal successors, (3791), 963 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3791 transitions. [2021-06-05 05:11:01,444 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3791 transitions. Word has length 26 [2021-06-05 05:11:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:01,444 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 3791 transitions. [2021-06-05 05:11:01,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3791 transitions. [2021-06-05 05:11:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:01,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:01,446 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:01,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 05:11:01,647 INFO L430 AbstractCegarLoop]: === Iteration 76 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1612140118, now seen corresponding path program 14 times [2021-06-05 05:11:01,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:01,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70485287] [2021-06-05 05:11:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:01,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:01,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70485287] [2021-06-05 05:11:01,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70485287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:01,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813410682] [2021-06-05 05:11:01,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:01,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:01,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:01,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:01,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:01,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:11:01,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:01,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:01,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:01,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-06-05 05:11:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:01,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813410682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:01,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:01,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 05:11:01,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061048624] [2021-06-05 05:11:01,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:11:01,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:01,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:11:01,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:11:01,911 INFO L87 Difference]: Start difference. First operand 964 states and 3791 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:02,612 INFO L93 Difference]: Finished difference Result 1767 states and 6932 transitions. [2021-06-05 05:11:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:02,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:02,615 INFO L225 Difference]: With dead ends: 1767 [2021-06-05 05:11:02,615 INFO L226 Difference]: Without dead ends: 1685 [2021-06-05 05:11:02,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:11:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-06-05 05:11:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 931. [2021-06-05 05:11:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-05 05:11:02,629 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-05 05:11:02,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:02,629 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-05 05:11:02,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:02,629 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-05 05:11:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:02,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:02,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:02,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 05:11:02,832 INFO L430 AbstractCegarLoop]: === Iteration 77 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:02,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:02,832 INFO L82 PathProgramCache]: Analyzing trace with hash -832793512, now seen corresponding path program 15 times [2021-06-05 05:11:02,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:02,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563655843] [2021-06-05 05:11:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:02,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:02,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563655843] [2021-06-05 05:11:02,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563655843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:02,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146300711] [2021-06-05 05:11:02,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:02,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:02,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:02,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:02,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:03,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:03,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:11:03,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:03,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:03,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:03,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 05:11:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:03,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146300711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:03,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:03,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:11:03,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749627722] [2021-06-05 05:11:03,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:11:03,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:03,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:11:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:11:03,115 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:03,744 INFO L93 Difference]: Finished difference Result 1732 states and 6724 transitions. [2021-06-05 05:11:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:03,747 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 05:11:03,747 INFO L226 Difference]: Without dead ends: 1568 [2021-06-05 05:11:03,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:11:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-06-05 05:11:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 931. [2021-06-05 05:11:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-05 05:11:03,762 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-05 05:11:03,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:03,762 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-05 05:11:03,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-05 05:11:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:03,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:03,764 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:03,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:03,966 INFO L430 AbstractCegarLoop]: === Iteration 78 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695216, now seen corresponding path program 16 times [2021-06-05 05:11:03,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:03,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842813543] [2021-06-05 05:11:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:04,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:04,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842813543] [2021-06-05 05:11:04,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842813543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:04,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565685331] [2021-06-05 05:11:04,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:04,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:04,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:04,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:04,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:04,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:04,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:04,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:04,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:04,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:04,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:11:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:04,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565685331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:04,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:04,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:04,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792405553] [2021-06-05 05:11:04,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:04,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:04,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:04,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:04,214 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:04,482 INFO L93 Difference]: Finished difference Result 1446 states and 5660 transitions. [2021-06-05 05:11:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:11:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:04,485 INFO L225 Difference]: With dead ends: 1446 [2021-06-05 05:11:04,485 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 05:11:04,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:11:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 05:11:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 931. [2021-06-05 05:11:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-05 05:11:04,499 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-05 05:11:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:04,499 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-05 05:11:04,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,499 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-05 05:11:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:04,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:04,500 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:04,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 05:11:04,701 INFO L430 AbstractCegarLoop]: === Iteration 79 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 992583964, now seen corresponding path program 15 times [2021-06-05 05:11:04,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:04,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469879028] [2021-06-05 05:11:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:04,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:04,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469879028] [2021-06-05 05:11:04,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469879028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:04,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275106936] [2021-06-05 05:11:04,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:04,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:11:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:04,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:04,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:04,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:04,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:11:04,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:04,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:04,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:04,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 05:11:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:04,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275106936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:04,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:04,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 05:11:04,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188171111] [2021-06-05 05:11:04,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:11:04,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:04,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:11:04,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:11:04,939 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:05,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:05,882 INFO L93 Difference]: Finished difference Result 1803 states and 7103 transitions. [2021-06-05 05:11:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:11:05,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:05,894 INFO L225 Difference]: With dead ends: 1803 [2021-06-05 05:11:05,894 INFO L226 Difference]: Without dead ends: 1721 [2021-06-05 05:11:05,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 706.4ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:11:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-05 05:11:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 940. [2021-06-05 05:11:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.957401490947817) internal successors, (3716), 939 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3716 transitions. [2021-06-05 05:11:05,910 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3716 transitions. Word has length 26 [2021-06-05 05:11:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:05,910 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3716 transitions. [2021-06-05 05:11:05,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3716 transitions. [2021-06-05 05:11:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:05,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:05,911 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:06,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:06,113 INFO L430 AbstractCegarLoop]: === Iteration 80 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1536354800, now seen corresponding path program 16 times [2021-06-05 05:11:06,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:06,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049627838] [2021-06-05 05:11:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:06,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:06,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049627838] [2021-06-05 05:11:06,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049627838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:06,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806254411] [2021-06-05 05:11:06,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:06,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:06,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:06,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:06,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:06,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:06,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:06,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:06,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:06,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:11:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:06,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806254411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:06,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:06,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:06,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718446392] [2021-06-05 05:11:06,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:06,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:06,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:06,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:06,364 INFO L87 Difference]: Start difference. First operand 940 states and 3716 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:06,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:06,597 INFO L93 Difference]: Finished difference Result 1341 states and 5252 transitions. [2021-06-05 05:11:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:06,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:06,599 INFO L225 Difference]: With dead ends: 1341 [2021-06-05 05:11:06,599 INFO L226 Difference]: Without dead ends: 1268 [2021-06-05 05:11:06,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-06-05 05:11:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 922. [2021-06-05 05:11:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 05:11:06,611 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 05:11:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:06,611 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 05:11:06,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 05:11:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:06,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:06,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:06,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 05:11:06,816 INFO L430 AbstractCegarLoop]: === Iteration 81 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:06,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1371947268, now seen corresponding path program 17 times [2021-06-05 05:11:06,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:06,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734983551] [2021-06-05 05:11:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:06,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:06,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734983551] [2021-06-05 05:11:06,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734983551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:06,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212993042] [2021-06-05 05:11:06,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:06,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:06,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:06,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:06,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:06,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:11:06,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:06,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:06,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:06,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:11:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:07,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212993042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:07,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:07,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:07,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605719992] [2021-06-05 05:11:07,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:07,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:07,026 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:07,432 INFO L93 Difference]: Finished difference Result 1898 states and 7325 transitions. [2021-06-05 05:11:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:07,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:07,435 INFO L225 Difference]: With dead ends: 1898 [2021-06-05 05:11:07,435 INFO L226 Difference]: Without dead ends: 1825 [2021-06-05 05:11:07,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-06-05 05:11:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 972. [2021-06-05 05:11:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.9155509783728117) internal successors, (3802), 971 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3802 transitions. [2021-06-05 05:11:07,452 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3802 transitions. Word has length 26 [2021-06-05 05:11:07,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:07,452 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3802 transitions. [2021-06-05 05:11:07,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:07,452 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3802 transitions. [2021-06-05 05:11:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:07,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:07,454 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:07,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 05:11:07,654 INFO L430 AbstractCegarLoop]: === Iteration 82 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash -2082246426, now seen corresponding path program 17 times [2021-06-05 05:11:07,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:07,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573016724] [2021-06-05 05:11:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:07,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573016724] [2021-06-05 05:11:07,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573016724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108099796] [2021-06-05 05:11:07,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:07,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:07,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:07,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:07,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:07,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:11:07,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:07,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:07,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:07,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:11:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:07,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108099796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:07,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:07,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:07,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665333820] [2021-06-05 05:11:07,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:07,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:07,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:07,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:07,889 INFO L87 Difference]: Start difference. First operand 972 states and 3802 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:08,285 INFO L93 Difference]: Finished difference Result 1853 states and 7166 transitions. [2021-06-05 05:11:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:08,288 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 05:11:08,288 INFO L226 Difference]: Without dead ends: 1780 [2021-06-05 05:11:08,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-06-05 05:11:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 945. [2021-06-05 05:11:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.9322033898305087) internal successors, (3712), 944 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3712 transitions. [2021-06-05 05:11:08,304 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3712 transitions. Word has length 26 [2021-06-05 05:11:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:08,304 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 3712 transitions. [2021-06-05 05:11:08,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:08,304 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3712 transitions. [2021-06-05 05:11:08,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:08,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:08,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:08,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:08,506 INFO L430 AbstractCegarLoop]: === Iteration 83 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:08,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1901734716, now seen corresponding path program 18 times [2021-06-05 05:11:08,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:08,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783556064] [2021-06-05 05:11:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:08,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:08,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783556064] [2021-06-05 05:11:08,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783556064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:08,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764377284] [2021-06-05 05:11:08,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:08,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:11:08,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:08,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:08,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:08,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:11:08,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:08,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:08,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:08,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 05:11:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:08,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764377284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:08,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:08,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:11:08,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388930445] [2021-06-05 05:11:08,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:11:08,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:08,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:11:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:08,801 INFO L87 Difference]: Start difference. First operand 945 states and 3712 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:09,679 INFO L93 Difference]: Finished difference Result 1734 states and 6750 transitions. [2021-06-05 05:11:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:09,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:09,682 INFO L225 Difference]: With dead ends: 1734 [2021-06-05 05:11:09,682 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 05:11:09,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 05:11:09,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 981. [2021-06-05 05:11:09,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.916326530612245) internal successors, (3838), 980 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3838 transitions. [2021-06-05 05:11:09,698 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3838 transitions. Word has length 26 [2021-06-05 05:11:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:09,698 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 3838 transitions. [2021-06-05 05:11:09,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3838 transitions. [2021-06-05 05:11:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:09,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:09,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:09,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:09,901 INFO L430 AbstractCegarLoop]: === Iteration 84 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1191435558, now seen corresponding path program 18 times [2021-06-05 05:11:09,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:09,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254737834] [2021-06-05 05:11:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:09,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:09,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254737834] [2021-06-05 05:11:09,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254737834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:09,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113687658] [2021-06-05 05:11:09,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:10,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:11:10,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:10,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:10,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:10,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:10,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:11:10,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:10,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:10,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:10,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 05:11:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:10,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113687658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:10,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:10,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:11:10,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451564426] [2021-06-05 05:11:10,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:11:10,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:10,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:11:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:10,216 INFO L87 Difference]: Start difference. First operand 981 states and 3838 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:11,026 INFO L93 Difference]: Finished difference Result 1687 states and 6586 transitions. [2021-06-05 05:11:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:11,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:11,029 INFO L225 Difference]: With dead ends: 1687 [2021-06-05 05:11:11,029 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 05:11:11,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 05:11:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 954. [2021-06-05 05:11:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.9328436516264427) internal successors, (3748), 953 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3748 transitions. [2021-06-05 05:11:11,046 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3748 transitions. Word has length 26 [2021-06-05 05:11:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:11,046 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3748 transitions. [2021-06-05 05:11:11,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,046 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3748 transitions. [2021-06-05 05:11:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:11,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:11,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:11,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 05:11:11,248 INFO L430 AbstractCegarLoop]: === Iteration 85 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:11,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:11,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1969961148, now seen corresponding path program 19 times [2021-06-05 05:11:11,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:11,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418070053] [2021-06-05 05:11:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:11,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:11,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418070053] [2021-06-05 05:11:11,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418070053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:11,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081894535] [2021-06-05 05:11:11,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:11,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:11,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:11,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:11,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:11,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:11,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:11,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:11:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:11,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081894535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:11,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:11,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:11,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799100027] [2021-06-05 05:11:11,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:11,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:11,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:11,498 INFO L87 Difference]: Start difference. First operand 954 states and 3748 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:11,764 INFO L93 Difference]: Finished difference Result 1477 states and 5784 transitions. [2021-06-05 05:11:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:11:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:11,767 INFO L225 Difference]: With dead ends: 1477 [2021-06-05 05:11:11,767 INFO L226 Difference]: Without dead ends: 1404 [2021-06-05 05:11:11,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:11:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-05 05:11:11,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 963. [2021-06-05 05:11:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9345114345114345) internal successors, (3785), 962 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3785 transitions. [2021-06-05 05:11:11,784 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3785 transitions. Word has length 26 [2021-06-05 05:11:11,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:11,784 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3785 transitions. [2021-06-05 05:11:11,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3785 transitions. [2021-06-05 05:11:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:11,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:11,786 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:11,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 05:11:11,987 INFO L430 AbstractCegarLoop]: === Iteration 86 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:11,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1656434752, now seen corresponding path program 20 times [2021-06-05 05:11:11,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:11,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862790676] [2021-06-05 05:11:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:12,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:12,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862790676] [2021-06-05 05:11:12,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862790676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205867765] [2021-06-05 05:11:12,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:12,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:12,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:12,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:12,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:11:12,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:12,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:12,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:11:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:12,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205867765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:12,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:11:12,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016316311] [2021-06-05 05:11:12,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:11:12,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:11:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:12,223 INFO L87 Difference]: Start difference. First operand 963 states and 3785 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:13,181 INFO L93 Difference]: Finished difference Result 1777 states and 6940 transitions. [2021-06-05 05:11:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:11:13,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:13,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:13,184 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 05:11:13,184 INFO L226 Difference]: Without dead ends: 1694 [2021-06-05 05:11:13,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 639.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:11:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-06-05 05:11:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 954. [2021-06-05 05:11:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.9328436516264427) internal successors, (3748), 953 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3748 transitions. [2021-06-05 05:11:13,200 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3748 transitions. Word has length 26 [2021-06-05 05:11:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:13,200 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3748 transitions. [2021-06-05 05:11:13,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3748 transitions. [2021-06-05 05:11:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:13,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:13,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:13,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 05:11:13,417 INFO L430 AbstractCegarLoop]: === Iteration 87 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:13,417 INFO L82 PathProgramCache]: Analyzing trace with hash 796935654, now seen corresponding path program 19 times [2021-06-05 05:11:13,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:13,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652238482] [2021-06-05 05:11:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:13,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:13,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652238482] [2021-06-05 05:11:13,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652238482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352301470] [2021-06-05 05:11:13,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:13,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:13,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:13,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:13,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:13,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:13,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:13,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:11:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:13,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352301470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:13,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:13,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542839031] [2021-06-05 05:11:13,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:13,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:13,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:13,603 INFO L87 Difference]: Start difference. First operand 954 states and 3748 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:13,863 INFO L93 Difference]: Finished difference Result 1424 states and 5591 transitions. [2021-06-05 05:11:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:11:13,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:13,866 INFO L225 Difference]: With dead ends: 1424 [2021-06-05 05:11:13,866 INFO L226 Difference]: Without dead ends: 1351 [2021-06-05 05:11:13,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:11:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-06-05 05:11:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 963. [2021-06-05 05:11:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9355509355509355) internal successors, (3786), 962 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3786 transitions. [2021-06-05 05:11:13,879 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3786 transitions. Word has length 26 [2021-06-05 05:11:13,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:13,879 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3786 transitions. [2021-06-05 05:11:13,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:13,879 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3786 transitions. [2021-06-05 05:11:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:13,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:13,880 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:14,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 05:11:14,082 INFO L430 AbstractCegarLoop]: === Iteration 88 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash 340650636, now seen corresponding path program 20 times [2021-06-05 05:11:14,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:14,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807575806] [2021-06-05 05:11:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:14,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:14,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807575806] [2021-06-05 05:11:14,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807575806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:14,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418309678] [2021-06-05 05:11:14,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:14,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:14,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:14,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:14,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:11:14,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:14,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:14,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:14,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:11:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:14,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418309678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:14,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:14,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:11:14,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881846948] [2021-06-05 05:11:14,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:11:14,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:14,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:11:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:14,363 INFO L87 Difference]: Start difference. First operand 963 states and 3786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:15,328 INFO L93 Difference]: Finished difference Result 1706 states and 6660 transitions. [2021-06-05 05:11:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:11:15,329 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:15,331 INFO L225 Difference]: With dead ends: 1706 [2021-06-05 05:11:15,331 INFO L226 Difference]: Without dead ends: 1631 [2021-06-05 05:11:15,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 653.9ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:11:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-05 05:11:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 945. [2021-06-05 05:11:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.9322033898305087) internal successors, (3712), 944 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3712 transitions. [2021-06-05 05:11:15,345 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3712 transitions. Word has length 26 [2021-06-05 05:11:15,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:15,345 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 3712 transitions. [2021-06-05 05:11:15,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3712 transitions. [2021-06-05 05:11:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:15,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:15,347 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:15,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 05:11:15,547 INFO L430 AbstractCegarLoop]: === Iteration 89 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -779527332, now seen corresponding path program 17 times [2021-06-05 05:11:15,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:15,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352978883] [2021-06-05 05:11:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:15,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:15,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352978883] [2021-06-05 05:11:15,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352978883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:15,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960187133] [2021-06-05 05:11:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:15,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:15,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:15,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:11:15,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:15,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:15,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:15,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:15,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:15,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:15,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-05 05:11:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:15,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960187133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:15,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:15,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 05:11:15,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136980381] [2021-06-05 05:11:15,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:11:15,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:15,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:11:15,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:15,786 INFO L87 Difference]: Start difference. First operand 945 states and 3712 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:16,491 INFO L93 Difference]: Finished difference Result 1955 states and 7444 transitions. [2021-06-05 05:11:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:11:16,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:16,494 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 05:11:16,494 INFO L226 Difference]: Without dead ends: 1819 [2021-06-05 05:11:16,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-06-05 05:11:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1022. [2021-06-05 05:11:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.853085210577865) internal successors, (3934), 1021 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3934 transitions. [2021-06-05 05:11:16,511 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3934 transitions. Word has length 26 [2021-06-05 05:11:16,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:16,511 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3934 transitions. [2021-06-05 05:11:16,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3934 transitions. [2021-06-05 05:11:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:16,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:16,513 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:16,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:16,713 INFO L430 AbstractCegarLoop]: === Iteration 90 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1489826490, now seen corresponding path program 17 times [2021-06-05 05:11:16,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:16,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660994185] [2021-06-05 05:11:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:16,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:16,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660994185] [2021-06-05 05:11:16,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660994185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:16,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294833347] [2021-06-05 05:11:16,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:16,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:16,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:16,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:16,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:16,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:11:16,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:16,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:16,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:16,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:11:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:16,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294833347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:16,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:16,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:16,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574419562] [2021-06-05 05:11:16,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:16,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:16,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:16,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:16,948 INFO L87 Difference]: Start difference. First operand 1022 states and 3934 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:17,378 INFO L93 Difference]: Finished difference Result 2154 states and 8372 transitions. [2021-06-05 05:11:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:17,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:17,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:17,382 INFO L225 Difference]: With dead ends: 2154 [2021-06-05 05:11:17,383 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 05:11:17,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 05:11:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1022. [2021-06-05 05:11:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.853085210577865) internal successors, (3934), 1021 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3934 transitions. [2021-06-05 05:11:17,399 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3934 transitions. Word has length 26 [2021-06-05 05:11:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:17,400 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3934 transitions. [2021-06-05 05:11:17,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3934 transitions. [2021-06-05 05:11:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:17,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:17,401 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:17,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:17,602 INFO L430 AbstractCegarLoop]: === Iteration 91 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:17,602 INFO L82 PathProgramCache]: Analyzing trace with hash 266522242, now seen corresponding path program 18 times [2021-06-05 05:11:17,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:17,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512183406] [2021-06-05 05:11:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:17,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:17,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512183406] [2021-06-05 05:11:17,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512183406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:17,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622960257] [2021-06-05 05:11:17,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:17,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:11:17,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:17,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:17,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:17,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:11:17,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:17,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:17,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:17,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 05:11:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:17,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622960257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:17,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:17,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 05:11:17,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256795118] [2021-06-05 05:11:17,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:11:17,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:17,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:11:17,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:17,840 INFO L87 Difference]: Start difference. First operand 1022 states and 3934 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:18,429 INFO L93 Difference]: Finished difference Result 2276 states and 8661 transitions. [2021-06-05 05:11:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:18,433 INFO L225 Difference]: With dead ends: 2276 [2021-06-05 05:11:18,433 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 05:11:18,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:11:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 05:11:18,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1064. [2021-06-05 05:11:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.83725305738476) internal successors, (4079), 1063 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 4079 transitions. [2021-06-05 05:11:18,450 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 4079 transitions. Word has length 26 [2021-06-05 05:11:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:18,450 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 4079 transitions. [2021-06-05 05:11:18,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 4079 transitions. [2021-06-05 05:11:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:18,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:18,452 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:18,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:18,652 INFO L430 AbstractCegarLoop]: === Iteration 92 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash -443776916, now seen corresponding path program 18 times [2021-06-05 05:11:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:18,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495665670] [2021-06-05 05:11:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:18,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495665670] [2021-06-05 05:11:18,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495665670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353213212] [2021-06-05 05:11:18,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:18,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:11:18,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:18,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:11:18,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:18,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:18,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:11:18,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:18,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:18,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:18,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-06-05 05:11:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:18,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353213212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:18,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:18,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 05:11:18,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625064094] [2021-06-05 05:11:18,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:11:18,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:18,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:11:18,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:11:18,916 INFO L87 Difference]: Start difference. First operand 1064 states and 4079 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:19,718 INFO L93 Difference]: Finished difference Result 1786 states and 6915 transitions. [2021-06-05 05:11:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:19,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:19,721 INFO L225 Difference]: With dead ends: 1786 [2021-06-05 05:11:19,721 INFO L226 Difference]: Without dead ends: 1704 [2021-06-05 05:11:19,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2021-06-05 05:11:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1031. [2021-06-05 05:11:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8514563106796116) internal successors, (3967), 1030 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3967 transitions. [2021-06-05 05:11:19,736 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3967 transitions. Word has length 26 [2021-06-05 05:11:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:19,736 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 3967 transitions. [2021-06-05 05:11:19,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3967 transitions. [2021-06-05 05:11:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:19,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:19,737 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:19,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 05:11:19,938 INFO L430 AbstractCegarLoop]: === Iteration 93 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:19,938 INFO L82 PathProgramCache]: Analyzing trace with hash 99242704, now seen corresponding path program 19 times [2021-06-05 05:11:19,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:19,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938789168] [2021-06-05 05:11:19,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:20,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:20,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938789168] [2021-06-05 05:11:20,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938789168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:20,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454871375] [2021-06-05 05:11:20,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:20,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:20,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:20,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:20,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:20,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:20,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:20,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:11:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:20,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454871375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:20,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:20,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:11:20,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922103412] [2021-06-05 05:11:20,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:11:20,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:11:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:11:20,206 INFO L87 Difference]: Start difference. First operand 1031 states and 3967 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:20,681 INFO L93 Difference]: Finished difference Result 1827 states and 7043 transitions. [2021-06-05 05:11:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:20,684 INFO L225 Difference]: With dead ends: 1827 [2021-06-05 05:11:20,684 INFO L226 Difference]: Without dead ends: 1736 [2021-06-05 05:11:20,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-05 05:11:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1031. [2021-06-05 05:11:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8514563106796116) internal successors, (3967), 1030 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3967 transitions. [2021-06-05 05:11:20,698 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3967 transitions. Word has length 26 [2021-06-05 05:11:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:20,699 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 3967 transitions. [2021-06-05 05:11:20,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3967 transitions. [2021-06-05 05:11:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:20,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:20,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:20,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 05:11:20,901 INFO L430 AbstractCegarLoop]: === Iteration 94 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:20,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1513235864, now seen corresponding path program 20 times [2021-06-05 05:11:20,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:20,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412372976] [2021-06-05 05:11:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:21,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:21,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412372976] [2021-06-05 05:11:21,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412372976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:21,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879043083] [2021-06-05 05:11:21,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:21,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:21,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:21,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:21,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:21,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:21,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:21,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:21,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:11:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:21,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879043083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:21,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:21,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:11:21,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443200229] [2021-06-05 05:11:21,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:11:21,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:11:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:11:21,147 INFO L87 Difference]: Start difference. First operand 1031 states and 3967 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:21,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:21,719 INFO L93 Difference]: Finished difference Result 1786 states and 6895 transitions. [2021-06-05 05:11:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:21,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:21,722 INFO L225 Difference]: With dead ends: 1786 [2021-06-05 05:11:21,722 INFO L226 Difference]: Without dead ends: 1696 [2021-06-05 05:11:21,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:11:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-06-05 05:11:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1031. [2021-06-05 05:11:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8514563106796116) internal successors, (3967), 1030 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3967 transitions. [2021-06-05 05:11:21,748 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3967 transitions. Word has length 26 [2021-06-05 05:11:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:21,748 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 3967 transitions. [2021-06-05 05:11:21,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3967 transitions. [2021-06-05 05:11:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:21,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:21,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:21,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 05:11:21,967 INFO L430 AbstractCegarLoop]: === Iteration 95 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:21,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1924620180, now seen corresponding path program 19 times [2021-06-05 05:11:21,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:21,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257148450] [2021-06-05 05:11:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:22,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:22,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257148450] [2021-06-05 05:11:22,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257148450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:22,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449726375] [2021-06-05 05:11:22,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:22,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:22,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:22,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:22,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:22,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:22,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:11:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:22,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449726375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:22,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:22,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:22,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757839915] [2021-06-05 05:11:22,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:22,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:22,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:22,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:22,171 INFO L87 Difference]: Start difference. First operand 1031 states and 3967 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:22,406 INFO L93 Difference]: Finished difference Result 1577 states and 6093 transitions. [2021-06-05 05:11:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:11:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:22,409 INFO L225 Difference]: With dead ends: 1577 [2021-06-05 05:11:22,409 INFO L226 Difference]: Without dead ends: 1495 [2021-06-05 05:11:22,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:11:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2021-06-05 05:11:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1040. [2021-06-05 05:11:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.8537054860442734) internal successors, (4004), 1039 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 4004 transitions. [2021-06-05 05:11:22,422 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 4004 transitions. Word has length 26 [2021-06-05 05:11:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:22,422 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 4004 transitions. [2021-06-05 05:11:22,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 4004 transitions. [2021-06-05 05:11:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:11:22,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:22,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:22,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:22,624 INFO L430 AbstractCegarLoop]: === Iteration 96 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash -604318584, now seen corresponding path program 20 times [2021-06-05 05:11:22,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:22,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164127789] [2021-06-05 05:11:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:22,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:22,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164127789] [2021-06-05 05:11:22,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164127789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:22,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782507218] [2021-06-05 05:11:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:22,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:22,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:22,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:11:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:22,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:22,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:11:22,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:22,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:22,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:22,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:11:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:22,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782507218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:22,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:22,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:11:22,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992065584] [2021-06-05 05:11:22,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:11:22,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:22,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:11:22,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:22,819 INFO L87 Difference]: Start difference. First operand 1040 states and 4004 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:23,117 INFO L93 Difference]: Finished difference Result 1561 states and 6013 transitions. [2021-06-05 05:11:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:11:23,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:11:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:23,120 INFO L225 Difference]: With dead ends: 1561 [2021-06-05 05:11:23,120 INFO L226 Difference]: Without dead ends: 1488 [2021-06-05 05:11:23,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-06-05 05:11:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1022. [2021-06-05 05:11:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.853085210577865) internal successors, (3934), 1021 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3934 transitions. [2021-06-05 05:11:23,134 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3934 transitions. Word has length 26 [2021-06-05 05:11:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:23,134 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3934 transitions. [2021-06-05 05:11:23,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3934 transitions. [2021-06-05 05:11:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:23,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:23,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:23,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 05:11:23,341 INFO L430 AbstractCegarLoop]: === Iteration 97 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:23,341 INFO L82 PathProgramCache]: Analyzing trace with hash -424605, now seen corresponding path program 21 times [2021-06-05 05:11:23,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:23,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489278101] [2021-06-05 05:11:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:23,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:23,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489278101] [2021-06-05 05:11:23,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489278101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320416361] [2021-06-05 05:11:23,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:23,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:23,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:23,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:23,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320416361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:23,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:11:23,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53819879] [2021-06-05 05:11:23,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:11:23,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:23,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:11:23,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:11:23,453 INFO L87 Difference]: Start difference. First operand 1022 states and 3934 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:23,665 INFO L93 Difference]: Finished difference Result 3341 states and 12590 transitions. [2021-06-05 05:11:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:11:23,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:23,671 INFO L225 Difference]: With dead ends: 3341 [2021-06-05 05:11:23,671 INFO L226 Difference]: Without dead ends: 3164 [2021-06-05 05:11:23,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-06-05 05:11:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 1496. [2021-06-05 05:11:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 4.113043478260869) internal successors, (6149), 1495 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 6149 transitions. [2021-06-05 05:11:23,699 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 6149 transitions. Word has length 28 [2021-06-05 05:11:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:23,699 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 6149 transitions. [2021-06-05 05:11:23,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 6149 transitions. [2021-06-05 05:11:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:23,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:23,701 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:23,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:23,902 INFO L430 AbstractCegarLoop]: === Iteration 98 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:23,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2039590629, now seen corresponding path program 22 times [2021-06-05 05:11:23,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:23,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856744997] [2021-06-05 05:11:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:23,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:23,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856744997] [2021-06-05 05:11:23,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856744997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160491895] [2021-06-05 05:11:23,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:23,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:23,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:23,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:24,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160491895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:24,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:24,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:11:24,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532578546] [2021-06-05 05:11:24,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:11:24,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:24,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:11:24,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:11:24,013 INFO L87 Difference]: Start difference. First operand 1496 states and 6149 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:24,201 INFO L93 Difference]: Finished difference Result 3298 states and 12722 transitions. [2021-06-05 05:11:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:11:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:24,207 INFO L225 Difference]: With dead ends: 3298 [2021-06-05 05:11:24,207 INFO L226 Difference]: Without dead ends: 3044 [2021-06-05 05:11:24,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-06-05 05:11:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 1857. [2021-06-05 05:11:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 4.1438577586206895) internal successors, (7691), 1856 states have internal predecessors, (7691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 7691 transitions. [2021-06-05 05:11:24,240 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 7691 transitions. Word has length 28 [2021-06-05 05:11:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:24,240 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 7691 transitions. [2021-06-05 05:11:24,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 7691 transitions. [2021-06-05 05:11:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:24,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:24,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:24,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:24,443 INFO L430 AbstractCegarLoop]: === Iteration 99 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:24,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1769348101, now seen corresponding path program 23 times [2021-06-05 05:11:24,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:24,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678619283] [2021-06-05 05:11:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:24,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:24,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678619283] [2021-06-05 05:11:24,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678619283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:24,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324558511] [2021-06-05 05:11:24,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:24,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:11:24,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:24,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:24,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324558511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:24,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:24,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:11:24,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355367798] [2021-06-05 05:11:24,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:24,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:24,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:24,545 INFO L87 Difference]: Start difference. First operand 1857 states and 7691 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:24,752 INFO L93 Difference]: Finished difference Result 3249 states and 12628 transitions. [2021-06-05 05:11:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:24,758 INFO L225 Difference]: With dead ends: 3249 [2021-06-05 05:11:24,758 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 05:11:24,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 05:11:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 1852. [2021-06-05 05:11:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 4.13290113452188) internal successors, (7650), 1851 states have internal predecessors, (7650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 7650 transitions. [2021-06-05 05:11:24,788 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 7650 transitions. Word has length 28 [2021-06-05 05:11:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:24,788 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 7650 transitions. [2021-06-05 05:11:24,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 7650 transitions. [2021-06-05 05:11:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:24,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:24,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:24,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:24,991 INFO L430 AbstractCegarLoop]: === Iteration 100 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:24,992 INFO L82 PathProgramCache]: Analyzing trace with hash 292393427, now seen corresponding path program 24 times [2021-06-05 05:11:24,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:24,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990618593] [2021-06-05 05:11:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:25,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990618593] [2021-06-05 05:11:25,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990618593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878394209] [2021-06-05 05:11:25,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:25,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:25,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:25,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878394209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:25,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:11:25,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889398886] [2021-06-05 05:11:25,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:25,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:25,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:25,115 INFO L87 Difference]: Start difference. First operand 1852 states and 7650 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:25,292 INFO L93 Difference]: Finished difference Result 3569 states and 13833 transitions. [2021-06-05 05:11:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:25,300 INFO L225 Difference]: With dead ends: 3569 [2021-06-05 05:11:25,300 INFO L226 Difference]: Without dead ends: 3317 [2021-06-05 05:11:25,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:11:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2021-06-05 05:11:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 2221. [2021-06-05 05:11:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2220 states have (on average 4.201351351351351) internal successors, (9327), 2220 states have internal predecessors, (9327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 9327 transitions. [2021-06-05 05:11:25,353 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 9327 transitions. Word has length 28 [2021-06-05 05:11:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:25,353 INFO L482 AbstractCegarLoop]: Abstraction has 2221 states and 9327 transitions. [2021-06-05 05:11:25,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 9327 transitions. [2021-06-05 05:11:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:25,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:25,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:25,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:25,556 INFO L430 AbstractCegarLoop]: === Iteration 101 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:25,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1655877393, now seen corresponding path program 25 times [2021-06-05 05:11:25,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:25,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186414975] [2021-06-05 05:11:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:25,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186414975] [2021-06-05 05:11:25,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186414975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902508015] [2021-06-05 05:11:25,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:25,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902508015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:25,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:11:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984020578] [2021-06-05 05:11:25,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:11:25,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:11:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:11:25,665 INFO L87 Difference]: Start difference. First operand 2221 states and 9327 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:25,885 INFO L93 Difference]: Finished difference Result 5363 states and 21241 transitions. [2021-06-05 05:11:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:11:25,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:25,895 INFO L225 Difference]: With dead ends: 5363 [2021-06-05 05:11:25,895 INFO L226 Difference]: Without dead ends: 5161 [2021-06-05 05:11:25,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:11:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-06-05 05:11:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 2722. [2021-06-05 05:11:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 4.300624770305035) internal successors, (11702), 2721 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 11702 transitions. [2021-06-05 05:11:25,949 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 11702 transitions. Word has length 28 [2021-06-05 05:11:25,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:25,949 INFO L482 AbstractCegarLoop]: Abstraction has 2722 states and 11702 transitions. [2021-06-05 05:11:25,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 11702 transitions. [2021-06-05 05:11:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:25,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:25,953 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:26,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:11:26,153 INFO L430 AbstractCegarLoop]: === Iteration 102 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1838985111, now seen corresponding path program 26 times [2021-06-05 05:11:26,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:26,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014386414] [2021-06-05 05:11:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:26,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:26,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014386414] [2021-06-05 05:11:26,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014386414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:26,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894575668] [2021-06-05 05:11:26,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:26,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:26,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:26,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:26,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:26,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894575668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:26,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:26,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:11:26,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841248755] [2021-06-05 05:11:26,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:26,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:26,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:26,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:26,276 INFO L87 Difference]: Start difference. First operand 2722 states and 11702 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:26,470 INFO L93 Difference]: Finished difference Result 3984 states and 16212 transitions. [2021-06-05 05:11:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:26,477 INFO L225 Difference]: With dead ends: 3984 [2021-06-05 05:11:26,477 INFO L226 Difference]: Without dead ends: 3895 [2021-06-05 05:11:26,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:11:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2021-06-05 05:11:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 2791. [2021-06-05 05:11:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 4.337992831541219) internal successors, (12103), 2790 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 12103 transitions. [2021-06-05 05:11:26,525 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 12103 transitions. Word has length 28 [2021-06-05 05:11:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:26,525 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 12103 transitions. [2021-06-05 05:11:26,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 12103 transitions. [2021-06-05 05:11:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:26,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:26,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:26,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 05:11:26,730 INFO L430 AbstractCegarLoop]: === Iteration 103 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:26,730 INFO L82 PathProgramCache]: Analyzing trace with hash 931528637, now seen corresponding path program 27 times [2021-06-05 05:11:26,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:26,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730874589] [2021-06-05 05:11:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:26,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730874589] [2021-06-05 05:11:26,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730874589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443430660] [2021-06-05 05:11:26,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:26,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:26,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:26,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:26,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443430660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:26,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:26,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:11:26,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48739946] [2021-06-05 05:11:26,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:26,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:26,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:26,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:26,864 INFO L87 Difference]: Start difference. First operand 2791 states and 12103 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:27,029 INFO L93 Difference]: Finished difference Result 5795 states and 23459 transitions. [2021-06-05 05:11:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:27,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:27,040 INFO L225 Difference]: With dead ends: 5795 [2021-06-05 05:11:27,040 INFO L226 Difference]: Without dead ends: 5676 [2021-06-05 05:11:27,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:11:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-05 05:11:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 3317. [2021-06-05 05:11:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 4.408926417370326) internal successors, (14620), 3316 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 14620 transitions. [2021-06-05 05:11:27,108 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 14620 transitions. Word has length 28 [2021-06-05 05:11:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:27,108 INFO L482 AbstractCegarLoop]: Abstraction has 3317 states and 14620 transitions. [2021-06-05 05:11:27,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 14620 transitions. [2021-06-05 05:11:27,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:27,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:27,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:27,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 05:11:27,314 INFO L430 AbstractCegarLoop]: === Iteration 104 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2051339415, now seen corresponding path program 28 times [2021-06-05 05:11:27,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:27,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105577809] [2021-06-05 05:11:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:27,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:27,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105577809] [2021-06-05 05:11:27,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105577809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153405202] [2021-06-05 05:11:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:27,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:27,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:27,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:27,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:27,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153405202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:27,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:27,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160489287] [2021-06-05 05:11:27,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:27,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:27,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:27,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:27,450 INFO L87 Difference]: Start difference. First operand 3317 states and 14620 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:27,685 INFO L93 Difference]: Finished difference Result 5598 states and 22674 transitions. [2021-06-05 05:11:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:11:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:27,695 INFO L225 Difference]: With dead ends: 5598 [2021-06-05 05:11:27,695 INFO L226 Difference]: Without dead ends: 5510 [2021-06-05 05:11:27,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-06-05 05:11:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 3445. [2021-06-05 05:11:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 4.398664343786295) internal successors, (15149), 3444 states have internal predecessors, (15149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 15149 transitions. [2021-06-05 05:11:27,761 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 15149 transitions. Word has length 28 [2021-06-05 05:11:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:27,761 INFO L482 AbstractCegarLoop]: Abstraction has 3445 states and 15149 transitions. [2021-06-05 05:11:27,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 15149 transitions. [2021-06-05 05:11:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:27,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:27,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:27,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 05:11:27,967 INFO L430 AbstractCegarLoop]: === Iteration 105 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:27,968 INFO L82 PathProgramCache]: Analyzing trace with hash -11324181, now seen corresponding path program 29 times [2021-06-05 05:11:27,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:27,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71043716] [2021-06-05 05:11:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:27,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:27,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71043716] [2021-06-05 05:11:27,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71043716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476807932] [2021-06-05 05:11:27,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:28,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:28,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:28,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:28,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476807932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:28,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:28,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:28,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291970830] [2021-06-05 05:11:28,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:28,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:28,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:28,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:28,071 INFO L87 Difference]: Start difference. First operand 3445 states and 15149 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:28,197 INFO L93 Difference]: Finished difference Result 4269 states and 18217 transitions. [2021-06-05 05:11:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:11:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:28,206 INFO L225 Difference]: With dead ends: 4269 [2021-06-05 05:11:28,206 INFO L226 Difference]: Without dead ends: 4269 [2021-06-05 05:11:28,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:11:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-06-05 05:11:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 3397. [2021-06-05 05:11:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 4.38545347467609) internal successors, (14893), 3396 states have internal predecessors, (14893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 14893 transitions. [2021-06-05 05:11:28,263 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 14893 transitions. Word has length 28 [2021-06-05 05:11:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:28,264 INFO L482 AbstractCegarLoop]: Abstraction has 3397 states and 14893 transitions. [2021-06-05 05:11:28,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 14893 transitions. [2021-06-05 05:11:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:28,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:28,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:28,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:28,484 INFO L430 AbstractCegarLoop]: === Iteration 106 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:28,485 INFO L82 PathProgramCache]: Analyzing trace with hash 956315095, now seen corresponding path program 30 times [2021-06-05 05:11:28,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:28,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404846229] [2021-06-05 05:11:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:28,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:28,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404846229] [2021-06-05 05:11:28,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404846229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:28,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396958701] [2021-06-05 05:11:28,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:28,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:28,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:28,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:28,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:28,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396958701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:28,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:28,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:28,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383590950] [2021-06-05 05:11:28,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:28,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:28,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:28,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:28,592 INFO L87 Difference]: Start difference. First operand 3397 states and 14893 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:28,834 INFO L93 Difference]: Finished difference Result 5336 states and 21844 transitions. [2021-06-05 05:11:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:11:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:28,844 INFO L225 Difference]: With dead ends: 5336 [2021-06-05 05:11:28,844 INFO L226 Difference]: Without dead ends: 5222 [2021-06-05 05:11:28,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5222 states. [2021-06-05 05:11:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5222 to 3511. [2021-06-05 05:11:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 3510 states have (on average 4.41965811965812) internal successors, (15513), 3510 states have internal predecessors, (15513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 15513 transitions. [2021-06-05 05:11:28,929 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 15513 transitions. Word has length 28 [2021-06-05 05:11:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:28,929 INFO L482 AbstractCegarLoop]: Abstraction has 3511 states and 15513 transitions. [2021-06-05 05:11:28,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 15513 transitions. [2021-06-05 05:11:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:28,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:28,934 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:29,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 05:11:29,137 INFO L430 AbstractCegarLoop]: === Iteration 107 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1758521383, now seen corresponding path program 31 times [2021-06-05 05:11:29,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:29,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488389366] [2021-06-05 05:11:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:29,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:29,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488389366] [2021-06-05 05:11:29,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488389366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:29,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868548762] [2021-06-05 05:11:29,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:29,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868548762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:29,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:29,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:29,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983008101] [2021-06-05 05:11:29,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:29,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:29,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:29,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:29,236 INFO L87 Difference]: Start difference. First operand 3511 states and 15513 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:29,384 INFO L93 Difference]: Finished difference Result 6122 states and 25138 transitions. [2021-06-05 05:11:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:11:29,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:29,395 INFO L225 Difference]: With dead ends: 6122 [2021-06-05 05:11:29,395 INFO L226 Difference]: Without dead ends: 5828 [2021-06-05 05:11:29,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-06-05 05:11:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 3569. [2021-06-05 05:11:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 3568 states have (on average 4.414237668161435) internal successors, (15750), 3568 states have internal predecessors, (15750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 15750 transitions. [2021-06-05 05:11:29,469 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 15750 transitions. Word has length 28 [2021-06-05 05:11:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:29,469 INFO L482 AbstractCegarLoop]: Abstraction has 3569 states and 15750 transitions. [2021-06-05 05:11:29,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 15750 transitions. [2021-06-05 05:11:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:29,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:29,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:29,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:29,698 INFO L430 AbstractCegarLoop]: === Iteration 108 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:29,698 INFO L82 PathProgramCache]: Analyzing trace with hash -520222033, now seen corresponding path program 32 times [2021-06-05 05:11:29,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:29,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286606425] [2021-06-05 05:11:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:29,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:29,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286606425] [2021-06-05 05:11:29,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286606425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:29,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533086205] [2021-06-05 05:11:29,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:29,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:29,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:29,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:29,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533086205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:29,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:29,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:29,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375120714] [2021-06-05 05:11:29,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:29,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:29,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:29,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:29,798 INFO L87 Difference]: Start difference. First operand 3569 states and 15750 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:30,003 INFO L93 Difference]: Finished difference Result 5817 states and 23783 transitions. [2021-06-05 05:11:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:11:30,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:30,014 INFO L225 Difference]: With dead ends: 5817 [2021-06-05 05:11:30,014 INFO L226 Difference]: Without dead ends: 5666 [2021-06-05 05:11:30,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2021-06-05 05:11:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 3449. [2021-06-05 05:11:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 4.444605568445476) internal successors, (15325), 3448 states have internal predecessors, (15325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 15325 transitions. [2021-06-05 05:11:30,115 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 15325 transitions. Word has length 28 [2021-06-05 05:11:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:30,115 INFO L482 AbstractCegarLoop]: Abstraction has 3449 states and 15325 transitions. [2021-06-05 05:11:30,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 15325 transitions. [2021-06-05 05:11:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:30,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:30,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:30,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:30,321 INFO L430 AbstractCegarLoop]: === Iteration 109 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1821034983, now seen corresponding path program 33 times [2021-06-05 05:11:30,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:30,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32601587] [2021-06-05 05:11:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:30,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:30,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32601587] [2021-06-05 05:11:30,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32601587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:30,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48483503] [2021-06-05 05:11:30,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:30,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:30,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:30,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:30,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:30,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48483503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:30,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:30,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:11:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409884347] [2021-06-05 05:11:30,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:11:30,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:11:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:11:30,415 INFO L87 Difference]: Start difference. First operand 3449 states and 15325 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:30,534 INFO L93 Difference]: Finished difference Result 4110 states and 17975 transitions. [2021-06-05 05:11:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:11:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:30,542 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 05:11:30,542 INFO L226 Difference]: Without dead ends: 4067 [2021-06-05 05:11:30,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2021-06-05 05:11:30,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 3438. [2021-06-05 05:11:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 4.451556590049462) internal successors, (15300), 3437 states have internal predecessors, (15300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 15300 transitions. [2021-06-05 05:11:30,592 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 15300 transitions. Word has length 28 [2021-06-05 05:11:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:30,592 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 15300 transitions. [2021-06-05 05:11:30,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 15300 transitions. [2021-06-05 05:11:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:30,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:30,598 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:30,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:30,798 INFO L430 AbstractCegarLoop]: === Iteration 110 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1143597769, now seen corresponding path program 34 times [2021-06-05 05:11:30,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:30,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611946239] [2021-06-05 05:11:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:30,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611946239] [2021-06-05 05:11:30,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611946239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880019491] [2021-06-05 05:11:30,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:30,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:30,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:30,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:30,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:30,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880019491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:30,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:30,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:11:30,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770502804] [2021-06-05 05:11:30,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:11:30,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:30,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:11:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:11:30,894 INFO L87 Difference]: Start difference. First operand 3438 states and 15300 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:30,987 INFO L93 Difference]: Finished difference Result 4436 states and 19277 transitions. [2021-06-05 05:11:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:11:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:30,996 INFO L225 Difference]: With dead ends: 4436 [2021-06-05 05:11:30,996 INFO L226 Difference]: Without dead ends: 4436 [2021-06-05 05:11:30,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-05 05:11:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3438. [2021-06-05 05:11:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 4.442828047716032) internal successors, (15270), 3437 states have internal predecessors, (15270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 15270 transitions. [2021-06-05 05:11:31,047 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 15270 transitions. Word has length 28 [2021-06-05 05:11:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:31,047 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 15270 transitions. [2021-06-05 05:11:31,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 15270 transitions. [2021-06-05 05:11:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:31,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:31,052 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:31,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:31,253 INFO L430 AbstractCegarLoop]: === Iteration 111 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:31,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1856145151, now seen corresponding path program 35 times [2021-06-05 05:11:31,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:31,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618095462] [2021-06-05 05:11:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:31,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:31,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618095462] [2021-06-05 05:11:31,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618095462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:31,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129287631] [2021-06-05 05:11:31,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:31,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:31,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129287631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:31,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:31,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:11:31,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928821605] [2021-06-05 05:11:31,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:11:31,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:31,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:11:31,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:11:31,366 INFO L87 Difference]: Start difference. First operand 3438 states and 15270 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:31,638 INFO L93 Difference]: Finished difference Result 5603 states and 22995 transitions. [2021-06-05 05:11:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:11:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:31,649 INFO L225 Difference]: With dead ends: 5603 [2021-06-05 05:11:31,649 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 05:11:31,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:11:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 05:11:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3523. [2021-06-05 05:11:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3523 states, 3522 states have (on average 4.458262350936968) internal successors, (15702), 3522 states have internal predecessors, (15702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3523 states to 3523 states and 15702 transitions. [2021-06-05 05:11:31,731 INFO L78 Accepts]: Start accepts. Automaton has 3523 states and 15702 transitions. Word has length 28 [2021-06-05 05:11:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:31,731 INFO L482 AbstractCegarLoop]: Abstraction has 3523 states and 15702 transitions. [2021-06-05 05:11:31,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3523 states and 15702 transitions. [2021-06-05 05:11:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:31,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:31,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:31,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:31,939 INFO L430 AbstractCegarLoop]: === Iteration 112 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash -398806911, now seen corresponding path program 36 times [2021-06-05 05:11:31,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:31,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761580640] [2021-06-05 05:11:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:31,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:31,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761580640] [2021-06-05 05:11:31,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761580640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:31,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062442952] [2021-06-05 05:11:31,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:31,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:11:31,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:31,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:32,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062442952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:32,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:32,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:11:32,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061421453] [2021-06-05 05:11:32,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:11:32,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:11:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:11:32,049 INFO L87 Difference]: Start difference. First operand 3523 states and 15702 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:32,225 INFO L93 Difference]: Finished difference Result 5173 states and 21715 transitions. [2021-06-05 05:11:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:11:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:32,234 INFO L225 Difference]: With dead ends: 5173 [2021-06-05 05:11:32,234 INFO L226 Difference]: Without dead ends: 4874 [2021-06-05 05:11:32,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2021-06-05 05:11:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 3688. [2021-06-05 05:11:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 4.490100352590182) internal successors, (16555), 3687 states have internal predecessors, (16555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 16555 transitions. [2021-06-05 05:11:32,293 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 16555 transitions. Word has length 28 [2021-06-05 05:11:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:32,293 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 16555 transitions. [2021-06-05 05:11:32,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 16555 transitions. [2021-06-05 05:11:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:32,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:32,299 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:32,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:32,499 INFO L430 AbstractCegarLoop]: === Iteration 113 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:32,499 INFO L82 PathProgramCache]: Analyzing trace with hash 87221655, now seen corresponding path program 37 times [2021-06-05 05:11:32,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:32,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457507421] [2021-06-05 05:11:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:32,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:32,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457507421] [2021-06-05 05:11:32,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457507421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:32,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117021960] [2021-06-05 05:11:32,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:32,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:32,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:32,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117021960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:32,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:32,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:11:32,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217210749] [2021-06-05 05:11:32,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:32,617 INFO L87 Difference]: Start difference. First operand 3688 states and 16555 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:32,803 INFO L93 Difference]: Finished difference Result 4799 states and 20479 transitions. [2021-06-05 05:11:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:32,813 INFO L225 Difference]: With dead ends: 4799 [2021-06-05 05:11:32,813 INFO L226 Difference]: Without dead ends: 4701 [2021-06-05 05:11:32,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:11:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-06-05 05:11:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 3505. [2021-06-05 05:11:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3505 states, 3504 states have (on average 4.476027397260274) internal successors, (15684), 3504 states have internal predecessors, (15684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3505 states to 3505 states and 15684 transitions. [2021-06-05 05:11:32,877 INFO L78 Accepts]: Start accepts. Automaton has 3505 states and 15684 transitions. Word has length 28 [2021-06-05 05:11:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:32,877 INFO L482 AbstractCegarLoop]: Abstraction has 3505 states and 15684 transitions. [2021-06-05 05:11:32,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3505 states and 15684 transitions. [2021-06-05 05:11:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:32,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:32,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:33,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 05:11:33,085 INFO L430 AbstractCegarLoop]: === Iteration 114 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2146004113, now seen corresponding path program 38 times [2021-06-05 05:11:33,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:33,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502911910] [2021-06-05 05:11:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:33,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:33,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502911910] [2021-06-05 05:11:33,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502911910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:33,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795506749] [2021-06-05 05:11:33,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:33,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:33,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:33,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:33,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795506749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:33,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:33,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:11:33,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774320748] [2021-06-05 05:11:33,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:33,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:33,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:33,214 INFO L87 Difference]: Start difference. First operand 3505 states and 15684 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:33,364 INFO L93 Difference]: Finished difference Result 6407 states and 26477 transitions. [2021-06-05 05:11:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:33,365 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:33,377 INFO L225 Difference]: With dead ends: 6407 [2021-06-05 05:11:33,377 INFO L226 Difference]: Without dead ends: 6155 [2021-06-05 05:11:33,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:11:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2021-06-05 05:11:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 3796. [2021-06-05 05:11:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.4574440052700925) internal successors, (16916), 3795 states have internal predecessors, (16916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 16916 transitions. [2021-06-05 05:11:33,459 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 16916 transitions. Word has length 28 [2021-06-05 05:11:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:33,459 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 16916 transitions. [2021-06-05 05:11:33,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 16916 transitions. [2021-06-05 05:11:33,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:33,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:33,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:33,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 05:11:33,666 INFO L430 AbstractCegarLoop]: === Iteration 115 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash 200692363, now seen corresponding path program 39 times [2021-06-05 05:11:33,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:33,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631134437] [2021-06-05 05:11:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:33,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:33,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631134437] [2021-06-05 05:11:33,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631134437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:33,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727011967] [2021-06-05 05:11:33,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:33,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:33,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:33,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:33,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727011967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:33,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:33,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:11:33,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031514012] [2021-06-05 05:11:33,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:11:33,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:33,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:11:33,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:11:33,771 INFO L87 Difference]: Start difference. First operand 3796 states and 16916 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:33,995 INFO L93 Difference]: Finished difference Result 6642 states and 28034 transitions. [2021-06-05 05:11:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:11:33,995 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:33,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:34,008 INFO L225 Difference]: With dead ends: 6642 [2021-06-05 05:11:34,008 INFO L226 Difference]: Without dead ends: 6448 [2021-06-05 05:11:34,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2021-06-05 05:11:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 4066. [2021-06-05 05:11:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 4065 states have (on average 4.525707257072571) internal successors, (18397), 4065 states have internal predecessors, (18397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 18397 transitions. [2021-06-05 05:11:34,084 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 18397 transitions. Word has length 28 [2021-06-05 05:11:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:34,084 INFO L482 AbstractCegarLoop]: Abstraction has 4066 states and 18397 transitions. [2021-06-05 05:11:34,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 18397 transitions. [2021-06-05 05:11:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:34,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:34,091 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:34,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 05:11:34,291 INFO L430 AbstractCegarLoop]: === Iteration 116 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:34,291 INFO L82 PathProgramCache]: Analyzing trace with hash 17584645, now seen corresponding path program 40 times [2021-06-05 05:11:34,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:34,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657970154] [2021-06-05 05:11:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:34,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657970154] [2021-06-05 05:11:34,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657970154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911431808] [2021-06-05 05:11:34,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:34,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:34,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:34,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:34,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911431808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:34,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:34,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:11:34,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91351749] [2021-06-05 05:11:34,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:34,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:34,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:34,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:34,394 INFO L87 Difference]: Start difference. First operand 4066 states and 18397 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:34,608 INFO L93 Difference]: Finished difference Result 5715 states and 24180 transitions. [2021-06-05 05:11:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:34,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:34,619 INFO L225 Difference]: With dead ends: 5715 [2021-06-05 05:11:34,619 INFO L226 Difference]: Without dead ends: 5626 [2021-06-05 05:11:34,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-05 05:11:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 3989. [2021-06-05 05:11:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3989 states, 3988 states have (on average 4.533600802407221) internal successors, (18080), 3988 states have internal predecessors, (18080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3989 states to 3989 states and 18080 transitions. [2021-06-05 05:11:34,692 INFO L78 Accepts]: Start accepts. Automaton has 3989 states and 18080 transitions. Word has length 28 [2021-06-05 05:11:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:34,692 INFO L482 AbstractCegarLoop]: Abstraction has 3989 states and 18080 transitions. [2021-06-05 05:11:34,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3989 states and 18080 transitions. [2021-06-05 05:11:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:34,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:34,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:34,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:34,898 INFO L430 AbstractCegarLoop]: === Iteration 117 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1506868903, now seen corresponding path program 41 times [2021-06-05 05:11:34,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:34,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813793158] [2021-06-05 05:11:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:34,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:34,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813793158] [2021-06-05 05:11:34,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813793158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:34,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284155712] [2021-06-05 05:11:34,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:34,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:34,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:34,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:34,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:34,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284155712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:34,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:34,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:11:34,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914096527] [2021-06-05 05:11:34,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:34,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:34,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:34,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:34,998 INFO L87 Difference]: Start difference. First operand 3989 states and 18080 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:35,151 INFO L93 Difference]: Finished difference Result 6786 states and 28942 transitions. [2021-06-05 05:11:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:35,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:35,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:35,165 INFO L225 Difference]: With dead ends: 6786 [2021-06-05 05:11:35,165 INFO L226 Difference]: Without dead ends: 6667 [2021-06-05 05:11:35,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:11:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-06-05 05:11:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 3772. [2021-06-05 05:11:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3772 states, 3771 states have (on average 4.483426146910634) internal successors, (16907), 3771 states have internal predecessors, (16907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3772 states to 3772 states and 16907 transitions. [2021-06-05 05:11:35,245 INFO L78 Accepts]: Start accepts. Automaton has 3772 states and 16907 transitions. Word has length 28 [2021-06-05 05:11:35,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:35,245 INFO L482 AbstractCegarLoop]: Abstraction has 3772 states and 16907 transitions. [2021-06-05 05:11:35,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3772 states and 16907 transitions. [2021-06-05 05:11:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:35,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:35,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:35,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:35,453 INFO L430 AbstractCegarLoop]: === Iteration 118 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1298098363, now seen corresponding path program 42 times [2021-06-05 05:11:35,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:35,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785293447] [2021-06-05 05:11:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:35,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:35,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785293447] [2021-06-05 05:11:35,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785293447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:35,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019756941] [2021-06-05 05:11:35,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:35,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:11:35,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:35,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:35,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:35,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019756941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:35,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:35,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:11:35,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726810471] [2021-06-05 05:11:35,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:11:35,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:11:35,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:11:35,544 INFO L87 Difference]: Start difference. First operand 3772 states and 16907 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:35,666 INFO L93 Difference]: Finished difference Result 4650 states and 20206 transitions. [2021-06-05 05:11:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:11:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:35,675 INFO L225 Difference]: With dead ends: 4650 [2021-06-05 05:11:35,675 INFO L226 Difference]: Without dead ends: 4486 [2021-06-05 05:11:35,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-05 05:11:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3725. [2021-06-05 05:11:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 4.506176154672395) internal successors, (16781), 3724 states have internal predecessors, (16781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 16781 transitions. [2021-06-05 05:11:35,731 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 16781 transitions. Word has length 28 [2021-06-05 05:11:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:35,732 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 16781 transitions. [2021-06-05 05:11:35,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 16781 transitions. [2021-06-05 05:11:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:35,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:35,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:35,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:35,953 INFO L430 AbstractCegarLoop]: === Iteration 119 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash 571732251, now seen corresponding path program 43 times [2021-06-05 05:11:35,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:35,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763547459] [2021-06-05 05:11:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:35,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:35,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763547459] [2021-06-05 05:11:35,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763547459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:35,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292410793] [2021-06-05 05:11:35,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:36,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292410793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:36,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:11:36,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047483796] [2021-06-05 05:11:36,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:11:36,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:36,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:11:36,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:11:36,099 INFO L87 Difference]: Start difference. First operand 3725 states and 16781 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:36,193 INFO L93 Difference]: Finished difference Result 4894 states and 21444 transitions. [2021-06-05 05:11:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:11:36,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:36,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:36,203 INFO L225 Difference]: With dead ends: 4894 [2021-06-05 05:11:36,203 INFO L226 Difference]: Without dead ends: 4894 [2021-06-05 05:11:36,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:11:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4894 states. [2021-06-05 05:11:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4894 to 3755. [2021-06-05 05:11:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 4.508790623335109) internal successors, (16926), 3754 states have internal predecessors, (16926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 16926 transitions. [2021-06-05 05:11:36,263 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 16926 transitions. Word has length 28 [2021-06-05 05:11:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:36,263 INFO L482 AbstractCegarLoop]: Abstraction has 3755 states and 16926 transitions. [2021-06-05 05:11:36,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 16926 transitions. [2021-06-05 05:11:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:36,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:36,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:36,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:36,470 INFO L430 AbstractCegarLoop]: === Iteration 120 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:36,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1136343519, now seen corresponding path program 44 times [2021-06-05 05:11:36,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:36,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304010064] [2021-06-05 05:11:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:36,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:36,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304010064] [2021-06-05 05:11:36,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304010064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294188430] [2021-06-05 05:11:36,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:36,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:36,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:36,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:36,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:36,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294188430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:36,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:36,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559146433] [2021-06-05 05:11:36,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:36,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:36,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:36,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:36,568 INFO L87 Difference]: Start difference. First operand 3755 states and 16926 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:36,766 INFO L93 Difference]: Finished difference Result 5651 states and 23907 transitions. [2021-06-05 05:11:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:11:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:36,778 INFO L225 Difference]: With dead ends: 5651 [2021-06-05 05:11:36,778 INFO L226 Difference]: Without dead ends: 5528 [2021-06-05 05:11:36,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5528 states. [2021-06-05 05:11:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5528 to 3782. [2021-06-05 05:11:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 4.539539804284581) internal successors, (17164), 3781 states have internal predecessors, (17164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 17164 transitions. [2021-06-05 05:11:36,845 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 17164 transitions. Word has length 28 [2021-06-05 05:11:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:36,845 INFO L482 AbstractCegarLoop]: Abstraction has 3782 states and 17164 transitions. [2021-06-05 05:11:36,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 17164 transitions. [2021-06-05 05:11:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:36,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:36,851 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:37,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:37,052 INFO L430 AbstractCegarLoop]: === Iteration 121 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:37,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1410972353, now seen corresponding path program 45 times [2021-06-05 05:11:37,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:37,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408134482] [2021-06-05 05:11:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:37,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:37,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408134482] [2021-06-05 05:11:37,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408134482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:37,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713746130] [2021-06-05 05:11:37,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:37,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:37,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:37,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:37,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:37,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713746130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:37,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:37,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:37,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294583544] [2021-06-05 05:11:37,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:37,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:37,151 INFO L87 Difference]: Start difference. First operand 3782 states and 17164 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:37,298 INFO L93 Difference]: Finished difference Result 4632 states and 20315 transitions. [2021-06-05 05:11:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:11:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:37,307 INFO L225 Difference]: With dead ends: 4632 [2021-06-05 05:11:37,308 INFO L226 Difference]: Without dead ends: 4632 [2021-06-05 05:11:37,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:11:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-06-05 05:11:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 3902. [2021-06-05 05:11:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3902 states, 3901 states have (on average 4.535247372468598) internal successors, (17692), 3901 states have internal predecessors, (17692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 17692 transitions. [2021-06-05 05:11:37,406 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 17692 transitions. Word has length 28 [2021-06-05 05:11:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:37,406 INFO L482 AbstractCegarLoop]: Abstraction has 3902 states and 17692 transitions. [2021-06-05 05:11:37,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 17692 transitions. [2021-06-05 05:11:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:37,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:37,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:37,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 05:11:37,613 INFO L430 AbstractCegarLoop]: === Iteration 122 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:37,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1216055663, now seen corresponding path program 46 times [2021-06-05 05:11:37,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:37,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651256628] [2021-06-05 05:11:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:37,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:37,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651256628] [2021-06-05 05:11:37,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651256628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:37,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147238772] [2021-06-05 05:11:37,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:37,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:37,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:37,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:37,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147238772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:37,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:37,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:37,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393424324] [2021-06-05 05:11:37,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:37,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:37,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:37,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:37,722 INFO L87 Difference]: Start difference. First operand 3902 states and 17692 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:37,951 INFO L93 Difference]: Finished difference Result 7832 states and 33399 transitions. [2021-06-05 05:11:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:11:37,952 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:37,970 INFO L225 Difference]: With dead ends: 7832 [2021-06-05 05:11:37,970 INFO L226 Difference]: Without dead ends: 7734 [2021-06-05 05:11:37,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2021-06-05 05:11:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 4483. [2021-06-05 05:11:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4483 states, 4482 states have (on average 4.557340473003124) internal successors, (20426), 4482 states have internal predecessors, (20426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 20426 transitions. [2021-06-05 05:11:38,076 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 20426 transitions. Word has length 28 [2021-06-05 05:11:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:38,076 INFO L482 AbstractCegarLoop]: Abstraction has 4483 states and 20426 transitions. [2021-06-05 05:11:38,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 20426 transitions. [2021-06-05 05:11:38,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:38,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:38,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:38,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:38,284 INFO L430 AbstractCegarLoop]: === Iteration 123 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:38,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1753521871, now seen corresponding path program 47 times [2021-06-05 05:11:38,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:38,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760729356] [2021-06-05 05:11:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:38,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:38,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760729356] [2021-06-05 05:11:38,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760729356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:38,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922630956] [2021-06-05 05:11:38,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:38,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:38,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:38,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922630956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:38,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:38,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:38,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94001870] [2021-06-05 05:11:38,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:38,384 INFO L87 Difference]: Start difference. First operand 4483 states and 20426 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:38,525 INFO L93 Difference]: Finished difference Result 6775 states and 28653 transitions. [2021-06-05 05:11:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:11:38,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:38,538 INFO L225 Difference]: With dead ends: 6775 [2021-06-05 05:11:38,539 INFO L226 Difference]: Without dead ends: 6523 [2021-06-05 05:11:38,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:11:38,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6523 states. [2021-06-05 05:11:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6523 to 4878. [2021-06-05 05:11:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4878 states, 4877 states have (on average 4.533729751896658) internal successors, (22111), 4877 states have internal predecessors, (22111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4878 states to 4878 states and 22111 transitions. [2021-06-05 05:11:38,625 INFO L78 Accepts]: Start accepts. Automaton has 4878 states and 22111 transitions. Word has length 28 [2021-06-05 05:11:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:38,625 INFO L482 AbstractCegarLoop]: Abstraction has 4878 states and 22111 transitions. [2021-06-05 05:11:38,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4878 states and 22111 transitions. [2021-06-05 05:11:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:38,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:38,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:38,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 05:11:38,833 INFO L430 AbstractCegarLoop]: === Iteration 124 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash 629820639, now seen corresponding path program 48 times [2021-06-05 05:11:38,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:38,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235454759] [2021-06-05 05:11:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:38,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:38,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235454759] [2021-06-05 05:11:38,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235454759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:38,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38958322] [2021-06-05 05:11:38,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:38,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:38,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:38,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:38,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38958322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:38,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:38,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:38,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840295398] [2021-06-05 05:11:38,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:38,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:38,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:38,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:38,939 INFO L87 Difference]: Start difference. First operand 4878 states and 22111 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:39,159 INFO L93 Difference]: Finished difference Result 5978 states and 25883 transitions. [2021-06-05 05:11:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:39,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:39,171 INFO L225 Difference]: With dead ends: 5978 [2021-06-05 05:11:39,171 INFO L226 Difference]: Without dead ends: 5889 [2021-06-05 05:11:39,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5889 states. [2021-06-05 05:11:39,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5889 to 4685. [2021-06-05 05:11:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 4.536720751494449) internal successors, (21250), 4684 states have internal predecessors, (21250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 21250 transitions. [2021-06-05 05:11:39,282 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 21250 transitions. Word has length 28 [2021-06-05 05:11:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:39,282 INFO L482 AbstractCegarLoop]: Abstraction has 4685 states and 21250 transitions. [2021-06-05 05:11:39,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 21250 transitions. [2021-06-05 05:11:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:11:39,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:39,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:39,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:39,491 INFO L430 AbstractCegarLoop]: === Iteration 125 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:39,491 INFO L82 PathProgramCache]: Analyzing trace with hash -894632909, now seen corresponding path program 49 times [2021-06-05 05:11:39,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:39,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878594086] [2021-06-05 05:11:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:39,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:39,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878594086] [2021-06-05 05:11:39,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878594086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:39,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650364923] [2021-06-05 05:11:39,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:39,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:11:39,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:39,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650364923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:39,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:39,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:11:39,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227002315] [2021-06-05 05:11:39,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:11:39,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:11:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:11:39,588 INFO L87 Difference]: Start difference. First operand 4685 states and 21250 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:39,748 INFO L93 Difference]: Finished difference Result 7586 states and 32323 transitions. [2021-06-05 05:11:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:11:39,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:11:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:39,763 INFO L225 Difference]: With dead ends: 7586 [2021-06-05 05:11:39,764 INFO L226 Difference]: Without dead ends: 7449 [2021-06-05 05:11:39,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:11:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7449 states. [2021-06-05 05:11:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7449 to 4472. [2021-06-05 05:11:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4472 states, 4471 states have (on average 4.534779691344219) internal successors, (20275), 4471 states have internal predecessors, (20275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 20275 transitions. [2021-06-05 05:11:39,856 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 20275 transitions. Word has length 28 [2021-06-05 05:11:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:39,856 INFO L482 AbstractCegarLoop]: Abstraction has 4472 states and 20275 transitions. [2021-06-05 05:11:39,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 20275 transitions. [2021-06-05 05:11:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:39,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:39,863 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:40,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 05:11:40,064 INFO L430 AbstractCegarLoop]: === Iteration 126 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2020102972, now seen corresponding path program 50 times [2021-06-05 05:11:40,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:40,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202209615] [2021-06-05 05:11:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:40,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:40,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202209615] [2021-06-05 05:11:40,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202209615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:40,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617459451] [2021-06-05 05:11:40,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:40,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:40,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:40,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:11:40,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:40,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:40,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:40,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:40,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:40,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:11:40,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:40,601 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 05:11:40,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:40,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 05:11:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:40,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617459451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:40,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:40,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 05:11:40,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628190157] [2021-06-05 05:11:40,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:11:40,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:11:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:40,656 INFO L87 Difference]: Start difference. First operand 4472 states and 20275 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:42,164 INFO L93 Difference]: Finished difference Result 5694 states and 24665 transitions. [2021-06-05 05:11:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:42,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:42,176 INFO L225 Difference]: With dead ends: 5694 [2021-06-05 05:11:42,176 INFO L226 Difference]: Without dead ends: 5532 [2021-06-05 05:11:42,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 844.1ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:11:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-06-05 05:11:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 4549. [2021-06-05 05:11:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4549 states, 4548 states have (on average 4.516051011433597) internal successors, (20539), 4548 states have internal predecessors, (20539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 20539 transitions. [2021-06-05 05:11:42,252 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 20539 transitions. Word has length 30 [2021-06-05 05:11:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:42,253 INFO L482 AbstractCegarLoop]: Abstraction has 4549 states and 20539 transitions. [2021-06-05 05:11:42,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 20539 transitions. [2021-06-05 05:11:42,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:42,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:42,259 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:42,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:42,473 INFO L430 AbstractCegarLoop]: === Iteration 127 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:42,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:42,473 INFO L82 PathProgramCache]: Analyzing trace with hash -334675676, now seen corresponding path program 1 times [2021-06-05 05:11:42,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:42,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472647195] [2021-06-05 05:11:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:42,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:42,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472647195] [2021-06-05 05:11:42,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472647195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:42,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105554044] [2021-06-05 05:11:42,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:42,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:42,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:42,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:42,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:11:42,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:42,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:42,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:42,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 05:11:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:42,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105554044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:42,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:42,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 05:11:42,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541086003] [2021-06-05 05:11:42,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:42,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:42,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:42,964 INFO L87 Difference]: Start difference. First operand 4549 states and 20539 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:43,957 INFO L93 Difference]: Finished difference Result 5260 states and 23354 transitions. [2021-06-05 05:11:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:11:43,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:43,968 INFO L225 Difference]: With dead ends: 5260 [2021-06-05 05:11:43,968 INFO L226 Difference]: Without dead ends: 5187 [2021-06-05 05:11:43,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:11:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2021-06-05 05:11:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 4573. [2021-06-05 05:11:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 4572 states have (on average 4.5150918635170605) internal successors, (20643), 4572 states have internal predecessors, (20643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 20643 transitions. [2021-06-05 05:11:44,045 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 20643 transitions. Word has length 30 [2021-06-05 05:11:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:44,045 INFO L482 AbstractCegarLoop]: Abstraction has 4573 states and 20643 transitions. [2021-06-05 05:11:44,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 20643 transitions. [2021-06-05 05:11:44,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:44,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:44,052 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:44,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:44,257 INFO L430 AbstractCegarLoop]: === Iteration 128 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:44,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1057468870, now seen corresponding path program 2 times [2021-06-05 05:11:44,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:44,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997281320] [2021-06-05 05:11:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:44,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:44,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997281320] [2021-06-05 05:11:44,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997281320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660008084] [2021-06-05 05:11:44,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:44,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:44,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:11:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:44,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:44,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:44,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:44,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:11:44,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:44,744 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 05:11:44,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:44,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-05 05:11:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:44,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660008084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:44,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 05:11:44,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236045591] [2021-06-05 05:11:44,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:11:44,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:44,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:11:44,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:44,809 INFO L87 Difference]: Start difference. First operand 4573 states and 20643 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:45,863 INFO L93 Difference]: Finished difference Result 4953 states and 22062 transitions. [2021-06-05 05:11:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:11:45,863 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:45,876 INFO L225 Difference]: With dead ends: 4953 [2021-06-05 05:11:45,876 INFO L226 Difference]: Without dead ends: 4872 [2021-06-05 05:11:45,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 680.5ms TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-06-05 05:11:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 4581. [2021-06-05 05:11:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 4.513100436681222) internal successors, (20670), 4580 states have internal predecessors, (20670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 20670 transitions. [2021-06-05 05:11:45,970 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 20670 transitions. Word has length 30 [2021-06-05 05:11:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:45,970 INFO L482 AbstractCegarLoop]: Abstraction has 4581 states and 20670 transitions. [2021-06-05 05:11:45,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 20670 transitions. [2021-06-05 05:11:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:45,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:45,978 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:46,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 05:11:46,181 INFO L430 AbstractCegarLoop]: === Iteration 129 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash 551122604, now seen corresponding path program 3 times [2021-06-05 05:11:46,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:46,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220521210] [2021-06-05 05:11:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:46,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:46,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220521210] [2021-06-05 05:11:46,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220521210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:46,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713383810] [2021-06-05 05:11:46,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:46,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:46,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:46,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:46,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:46,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:46,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:11:46,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:46,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 05:11:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:46,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713383810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:46,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:46,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 05:11:46,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266718128] [2021-06-05 05:11:46,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:46,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:46,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:46,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:46,661 INFO L87 Difference]: Start difference. First operand 4581 states and 20670 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:47,592 INFO L93 Difference]: Finished difference Result 5288 states and 23473 transitions. [2021-06-05 05:11:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:11:47,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:47,604 INFO L225 Difference]: With dead ends: 5288 [2021-06-05 05:11:47,604 INFO L226 Difference]: Without dead ends: 5215 [2021-06-05 05:11:47,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2021-06-05 05:11:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 4583. [2021-06-05 05:11:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 4.513531209079005) internal successors, (20681), 4582 states have internal predecessors, (20681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 20681 transitions. [2021-06-05 05:11:47,741 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 20681 transitions. Word has length 30 [2021-06-05 05:11:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:47,741 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 20681 transitions. [2021-06-05 05:11:47,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 20681 transitions. [2021-06-05 05:11:47,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:47,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:47,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:47,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:47,950 INFO L430 AbstractCegarLoop]: === Iteration 130 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1527142108, now seen corresponding path program 4 times [2021-06-05 05:11:47,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:47,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805516197] [2021-06-05 05:11:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:48,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:48,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805516197] [2021-06-05 05:11:48,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805516197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:48,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466268009] [2021-06-05 05:11:48,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:48,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:48,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:48,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:48,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:11:48,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:48,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:48,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:48,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:11:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:48,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466268009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:48,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:48,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:11:48,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509493717] [2021-06-05 05:11:48,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:48,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:48,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:48,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:48,387 INFO L87 Difference]: Start difference. First operand 4583 states and 20681 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:49,490 INFO L93 Difference]: Finished difference Result 6197 states and 27339 transitions. [2021-06-05 05:11:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:11:49,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:49,503 INFO L225 Difference]: With dead ends: 6197 [2021-06-05 05:11:49,503 INFO L226 Difference]: Without dead ends: 6116 [2021-06-05 05:11:49,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 754.0ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:11:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2021-06-05 05:11:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 4656. [2021-06-05 05:11:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 4.501825993555316) internal successors, (20956), 4655 states have internal predecessors, (20956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 20956 transitions. [2021-06-05 05:11:49,586 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 20956 transitions. Word has length 30 [2021-06-05 05:11:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:49,586 INFO L482 AbstractCegarLoop]: Abstraction has 4656 states and 20956 transitions. [2021-06-05 05:11:49,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 20956 transitions. [2021-06-05 05:11:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:49,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:49,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:49,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:49,794 INFO L430 AbstractCegarLoop]: === Iteration 131 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:49,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:49,794 INFO L82 PathProgramCache]: Analyzing trace with hash 158285188, now seen corresponding path program 21 times [2021-06-05 05:11:49,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:49,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700795486] [2021-06-05 05:11:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:49,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:49,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700795486] [2021-06-05 05:11:49,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700795486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:49,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123681903] [2021-06-05 05:11:49,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:49,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:49,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:11:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:50,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:50,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:50,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:11:50,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:50,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:50,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:50,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:11:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123681903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:50,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:50,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:11:50,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37090133] [2021-06-05 05:11:50,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:11:50,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:11:50,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:50,243 INFO L87 Difference]: Start difference. First operand 4656 states and 20956 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:51,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:51,423 INFO L93 Difference]: Finished difference Result 6304 states and 27617 transitions. [2021-06-05 05:11:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:11:51,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:51,439 INFO L225 Difference]: With dead ends: 6304 [2021-06-05 05:11:51,439 INFO L226 Difference]: Without dead ends: 6223 [2021-06-05 05:11:51,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 726.4ms TimeCoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:11:51,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6223 states. [2021-06-05 05:11:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6223 to 4652. [2021-06-05 05:11:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 4.50505267684369) internal successors, (20953), 4651 states have internal predecessors, (20953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 20953 transitions. [2021-06-05 05:11:51,520 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 20953 transitions. Word has length 30 [2021-06-05 05:11:51,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:51,521 INFO L482 AbstractCegarLoop]: Abstraction has 4652 states and 20953 transitions. [2021-06-05 05:11:51,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 20953 transitions. [2021-06-05 05:11:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:51,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:51,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:51,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:51,728 INFO L430 AbstractCegarLoop]: === Iteration 132 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1970041248, now seen corresponding path program 5 times [2021-06-05 05:11:51,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:51,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549365396] [2021-06-05 05:11:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:51,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:51,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549365396] [2021-06-05 05:11:51,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549365396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:51,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449426524] [2021-06-05 05:11:51,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:51,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:51,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:51,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:52,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:11:52,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:52,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:52,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:52,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:11:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:52,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449426524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:52,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:52,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:11:52,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409642242] [2021-06-05 05:11:52,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:52,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:52,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:52,091 INFO L87 Difference]: Start difference. First operand 4652 states and 20953 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:53,186 INFO L93 Difference]: Finished difference Result 6187 states and 27312 transitions. [2021-06-05 05:11:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:11:53,186 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:53,198 INFO L225 Difference]: With dead ends: 6187 [2021-06-05 05:11:53,199 INFO L226 Difference]: Without dead ends: 6106 [2021-06-05 05:11:53,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 746.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:11:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-05 05:11:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 4662. [2021-06-05 05:11:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 4661 states have (on average 4.503540012872774) internal successors, (20991), 4661 states have internal predecessors, (20991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 20991 transitions. [2021-06-05 05:11:53,279 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 20991 transitions. Word has length 30 [2021-06-05 05:11:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:53,280 INFO L482 AbstractCegarLoop]: Abstraction has 4662 states and 20991 transitions. [2021-06-05 05:11:53,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 20991 transitions. [2021-06-05 05:11:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:53,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:53,287 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:53,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:53,488 INFO L430 AbstractCegarLoop]: === Iteration 133 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:53,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1818579782, now seen corresponding path program 6 times [2021-06-05 05:11:53,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:53,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369584620] [2021-06-05 05:11:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:53,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:53,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369584620] [2021-06-05 05:11:53,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369584620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:53,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350115916] [2021-06-05 05:11:53,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:53,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:11:53,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:53,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:53,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:53,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:53,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:53,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 05:11:53,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:53,891 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-06-05 05:11:53,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:53,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 05:11:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:53,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350115916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:53,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:53,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:11:53,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298567405] [2021-06-05 05:11:53,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:11:53,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:11:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:11:53,990 INFO L87 Difference]: Start difference. First operand 4662 states and 20991 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:55,731 INFO L93 Difference]: Finished difference Result 6267 states and 27331 transitions. [2021-06-05 05:11:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:11:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:55,745 INFO L225 Difference]: With dead ends: 6267 [2021-06-05 05:11:55,745 INFO L226 Difference]: Without dead ends: 6121 [2021-06-05 05:11:55,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1148.0ms TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:11:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2021-06-05 05:11:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 4638. [2021-06-05 05:11:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 4.509381065343972) internal successors, (20910), 4637 states have internal predecessors, (20910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 20910 transitions. [2021-06-05 05:11:55,826 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 20910 transitions. Word has length 30 [2021-06-05 05:11:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:55,827 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 20910 transitions. [2021-06-05 05:11:55,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 20910 transitions. [2021-06-05 05:11:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:55,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:55,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:56,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:56,034 INFO L430 AbstractCegarLoop]: === Iteration 134 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1727284940, now seen corresponding path program 51 times [2021-06-05 05:11:56,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:56,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448142708] [2021-06-05 05:11:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:56,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:56,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448142708] [2021-06-05 05:11:56,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448142708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:56,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674542906] [2021-06-05 05:11:56,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:56,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:11:56,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:11:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:56,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:56,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:56,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:56,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 05:11:56,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:56,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:56,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:56,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:93 [2021-06-05 05:11:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:56,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674542906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:56,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:56,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:11:56,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593955299] [2021-06-05 05:11:56,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:56,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:56,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:56,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:56,639 INFO L87 Difference]: Start difference. First operand 4638 states and 20910 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:59,226 INFO L93 Difference]: Finished difference Result 6309 states and 27411 transitions. [2021-06-05 05:11:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:11:59,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:59,242 INFO L225 Difference]: With dead ends: 6309 [2021-06-05 05:11:59,243 INFO L226 Difference]: Without dead ends: 5982 [2021-06-05 05:11:59,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1965.3ms TimeCoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:11:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5982 states. [2021-06-05 05:11:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5982 to 4673. [2021-06-05 05:11:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 4.513270547945205) internal successors, (21086), 4672 states have internal predecessors, (21086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 21086 transitions. [2021-06-05 05:11:59,326 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 21086 transitions. Word has length 30 [2021-06-05 05:11:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:59,327 INFO L482 AbstractCegarLoop]: Abstraction has 4673 states and 21086 transitions. [2021-06-05 05:11:59,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 21086 transitions. [2021-06-05 05:11:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:59,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:59,334 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:59,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:59,534 INFO L430 AbstractCegarLoop]: === Iteration 135 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:59,535 INFO L82 PathProgramCache]: Analyzing trace with hash 806718224, now seen corresponding path program 7 times [2021-06-05 05:11:59,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:59,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698367727] [2021-06-05 05:11:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:59,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698367727] [2021-06-05 05:11:59,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698367727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583004242] [2021-06-05 05:11:59,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:59,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:00,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:00,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:00,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:12:00,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:00,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:00,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:00,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 05:12:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:00,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583004242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:00,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:00,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:12:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265838781] [2021-06-05 05:12:00,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:00,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:00,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:00,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:00,119 INFO L87 Difference]: Start difference. First operand 4673 states and 21086 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:01,383 INFO L93 Difference]: Finished difference Result 5776 states and 25526 transitions. [2021-06-05 05:12:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:12:01,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:01,396 INFO L225 Difference]: With dead ends: 5776 [2021-06-05 05:12:01,396 INFO L226 Difference]: Without dead ends: 5695 [2021-06-05 05:12:01,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 848.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:12:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2021-06-05 05:12:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 4673. [2021-06-05 05:12:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 4.513270547945205) internal successors, (21086), 4672 states have internal predecessors, (21086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 21086 transitions. [2021-06-05 05:12:01,475 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 21086 transitions. Word has length 30 [2021-06-05 05:12:01,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:01,475 INFO L482 AbstractCegarLoop]: Abstraction has 4673 states and 21086 transitions. [2021-06-05 05:12:01,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 21086 transitions. [2021-06-05 05:12:01,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:01,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:01,482 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:01,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 05:12:01,683 INFO L430 AbstractCegarLoop]: === Iteration 136 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:01,683 INFO L82 PathProgramCache]: Analyzing trace with hash 594062564, now seen corresponding path program 52 times [2021-06-05 05:12:01,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:01,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308896464] [2021-06-05 05:12:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:01,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:01,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308896464] [2021-06-05 05:12:01,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308896464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:01,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628968716] [2021-06-05 05:12:01,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:01,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:01,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:01,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:01,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:02,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:02,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:02,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:12:02,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:02,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:02,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:02,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:12:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:02,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628968716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:02,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:02,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:12:02,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485582267] [2021-06-05 05:12:02,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:12:02,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:02,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:12:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:02,187 INFO L87 Difference]: Start difference. First operand 4673 states and 21086 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:02,622 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 05:12:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:03,735 INFO L93 Difference]: Finished difference Result 5436 states and 24076 transitions. [2021-06-05 05:12:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:12:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:03,748 INFO L225 Difference]: With dead ends: 5436 [2021-06-05 05:12:03,748 INFO L226 Difference]: Without dead ends: 5363 [2021-06-05 05:12:03,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1245.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:12:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2021-06-05 05:12:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 4690. [2021-06-05 05:12:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4689 states have (on average 4.512689272766048) internal successors, (21160), 4689 states have internal predecessors, (21160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 21160 transitions. [2021-06-05 05:12:03,834 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 21160 transitions. Word has length 30 [2021-06-05 05:12:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:03,834 INFO L482 AbstractCegarLoop]: Abstraction has 4690 states and 21160 transitions. [2021-06-05 05:12:03,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 21160 transitions. [2021-06-05 05:12:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:03,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:03,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:04,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 05:12:04,042 INFO L430 AbstractCegarLoop]: === Iteration 137 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash -801524512, now seen corresponding path program 53 times [2021-06-05 05:12:04,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:04,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224003236] [2021-06-05 05:12:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:04,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224003236] [2021-06-05 05:12:04,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224003236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:04,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774481815] [2021-06-05 05:12:04,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:04,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:12:04,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:04,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:04,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:04,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:04,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 05:12:04,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:04,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:04,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:04,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:91 [2021-06-05 05:12:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774481815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:04,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:04,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:12:04,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910066624] [2021-06-05 05:12:04,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:12:04,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:12:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:12:04,730 INFO L87 Difference]: Start difference. First operand 4690 states and 21160 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,298 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-05 05:12:06,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:06,467 INFO L93 Difference]: Finished difference Result 5502 states and 24471 transitions. [2021-06-05 05:12:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:12:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:06,482 INFO L225 Difference]: With dead ends: 5502 [2021-06-05 05:12:06,482 INFO L226 Difference]: Without dead ends: 5439 [2021-06-05 05:12:06,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1503.4ms TimeCoverageRelationStatistics Valid=289, Invalid=1967, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:12:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5439 states. [2021-06-05 05:12:06,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5439 to 4692. [2021-06-05 05:12:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 4.512044340225964) internal successors, (21166), 4691 states have internal predecessors, (21166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 21166 transitions. [2021-06-05 05:12:06,580 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 21166 transitions. Word has length 30 [2021-06-05 05:12:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:06,580 INFO L482 AbstractCegarLoop]: Abstraction has 4692 states and 21166 transitions. [2021-06-05 05:12:06,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 21166 transitions. [2021-06-05 05:12:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:06,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:06,589 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:06,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 05:12:06,790 INFO L430 AbstractCegarLoop]: === Iteration 138 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 492452108, now seen corresponding path program 54 times [2021-06-05 05:12:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:06,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214504814] [2021-06-05 05:12:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:07,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:07,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214504814] [2021-06-05 05:12:07,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214504814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:07,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252832692] [2021-06-05 05:12:07,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:07,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:07,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:07,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:07,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:07,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:07,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:07,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 05:12:07,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:07,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:07,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:07,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:24 [2021-06-05 05:12:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:07,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252832692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:07,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:07,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:12:07,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618770234] [2021-06-05 05:12:07,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:07,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:07,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:07,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:07,416 INFO L87 Difference]: Start difference. First operand 4692 states and 21166 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:08,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:08,978 INFO L93 Difference]: Finished difference Result 5964 states and 26266 transitions. [2021-06-05 05:12:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:12:08,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:08,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:08,991 INFO L225 Difference]: With dead ends: 5964 [2021-06-05 05:12:08,991 INFO L226 Difference]: Without dead ends: 5867 [2021-06-05 05:12:08,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1182.0ms TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:12:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2021-06-05 05:12:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 4692. [2021-06-05 05:12:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 4.512044340225964) internal successors, (21166), 4691 states have internal predecessors, (21166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 21166 transitions. [2021-06-05 05:12:09,084 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 21166 transitions. Word has length 30 [2021-06-05 05:12:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:09,084 INFO L482 AbstractCegarLoop]: Abstraction has 4692 states and 21166 transitions. [2021-06-05 05:12:09,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 21166 transitions. [2021-06-05 05:12:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:09,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:09,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:09,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 05:12:09,293 INFO L430 AbstractCegarLoop]: === Iteration 139 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash -172480814, now seen corresponding path program 8 times [2021-06-05 05:12:09,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:09,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627657930] [2021-06-05 05:12:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:09,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:09,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627657930] [2021-06-05 05:12:09,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627657930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:09,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110653451] [2021-06-05 05:12:09,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:09,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:09,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:09,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:09,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:09,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:09,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:09,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 05:12:09,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:09,851 INFO L628 ElimStorePlain]: treesize reduction 33, result has 52.2 percent of original size [2021-06-05 05:12:09,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:09,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-06-05 05:12:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:09,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110653451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:09,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:09,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:12:09,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052264924] [2021-06-05 05:12:09,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:09,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:09,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:09,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:09,959 INFO L87 Difference]: Start difference. First operand 4692 states and 21166 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:11,734 INFO L93 Difference]: Finished difference Result 5549 states and 24307 transitions. [2021-06-05 05:12:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:12:11,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:11,746 INFO L225 Difference]: With dead ends: 5549 [2021-06-05 05:12:11,746 INFO L226 Difference]: Without dead ends: 5387 [2021-06-05 05:12:11,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1262.6ms TimeCoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:12:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5387 states. [2021-06-05 05:12:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5387 to 4692. [2021-06-05 05:12:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 4.512044340225964) internal successors, (21166), 4691 states have internal predecessors, (21166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 21166 transitions. [2021-06-05 05:12:11,837 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 21166 transitions. Word has length 30 [2021-06-05 05:12:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:11,837 INFO L482 AbstractCegarLoop]: Abstraction has 4692 states and 21166 transitions. [2021-06-05 05:12:11,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 21166 transitions. [2021-06-05 05:12:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:11,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:11,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:12,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 05:12:12,046 INFO L430 AbstractCegarLoop]: === Iteration 140 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:12,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1897976964, now seen corresponding path program 9 times [2021-06-05 05:12:12,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:12,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804582598] [2021-06-05 05:12:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:12,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:12,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804582598] [2021-06-05 05:12:12,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804582598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:12,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580466839] [2021-06-05 05:12:12,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:12,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:12:12,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:12:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:12,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:12,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:12,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:12,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 05:12:12,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:12,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:12,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:12,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-05 05:12:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:12,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580466839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:12,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:12,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:12:12,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345250261] [2021-06-05 05:12:12,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:12,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:12,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:12,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:12,765 INFO L87 Difference]: Start difference. First operand 4692 states and 21166 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:14,824 INFO L93 Difference]: Finished difference Result 5334 states and 23569 transitions. [2021-06-05 05:12:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:12:14,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:14,836 INFO L225 Difference]: With dead ends: 5334 [2021-06-05 05:12:14,836 INFO L226 Difference]: Without dead ends: 5252 [2021-06-05 05:12:14,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1657.5ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:12:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5252 states. [2021-06-05 05:12:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5252 to 4697. [2021-06-05 05:12:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 4.5119250425894375) internal successors, (21188), 4696 states have internal predecessors, (21188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 21188 transitions. [2021-06-05 05:12:14,918 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 21188 transitions. Word has length 30 [2021-06-05 05:12:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:14,918 INFO L482 AbstractCegarLoop]: Abstraction has 4697 states and 21188 transitions. [2021-06-05 05:12:14,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 21188 transitions. [2021-06-05 05:12:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:14,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:14,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:15,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:15,127 INFO L430 AbstractCegarLoop]: === Iteration 141 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1365219982, now seen corresponding path program 10 times [2021-06-05 05:12:15,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:15,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39775877] [2021-06-05 05:12:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:15,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:15,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39775877] [2021-06-05 05:12:15,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39775877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:15,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661503284] [2021-06-05 05:12:15,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:15,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:15,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:15,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:15,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:15,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:15,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:12:15,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:15,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:15,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:15,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:12:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:15,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661503284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:15,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:15,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 05:12:15,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444852847] [2021-06-05 05:12:15,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:12:15,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:15,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:12:15,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:15,650 INFO L87 Difference]: Start difference. First operand 4697 states and 21188 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:16,622 INFO L93 Difference]: Finished difference Result 5319 states and 23629 transitions. [2021-06-05 05:12:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:12:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:16,634 INFO L225 Difference]: With dead ends: 5319 [2021-06-05 05:12:16,634 INFO L226 Difference]: Without dead ends: 5244 [2021-06-05 05:12:16,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 646.8ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:12:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2021-06-05 05:12:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 4693. [2021-06-05 05:12:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 4.512787723785166) internal successors, (21174), 4692 states have internal predecessors, (21174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 21174 transitions. [2021-06-05 05:12:16,713 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 21174 transitions. Word has length 30 [2021-06-05 05:12:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:16,713 INFO L482 AbstractCegarLoop]: Abstraction has 4693 states and 21174 transitions. [2021-06-05 05:12:16,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 21174 transitions. [2021-06-05 05:12:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:16,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:16,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:16,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:16,922 INFO L430 AbstractCegarLoop]: === Iteration 142 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 87177790, now seen corresponding path program 55 times [2021-06-05 05:12:16,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:16,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209571561] [2021-06-05 05:12:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:17,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:17,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209571561] [2021-06-05 05:12:17,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209571561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:17,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758940260] [2021-06-05 05:12:17,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:17,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:17,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:17,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:17,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:12:17,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:17,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:17,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:17,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 05:12:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:17,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758940260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:17,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:17,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:12:17,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079914835] [2021-06-05 05:12:17,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:12:17,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:17,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:12:17,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:17,447 INFO L87 Difference]: Start difference. First operand 4693 states and 21174 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:19,455 INFO L93 Difference]: Finished difference Result 5914 states and 25887 transitions. [2021-06-05 05:12:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:12:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:19,467 INFO L225 Difference]: With dead ends: 5914 [2021-06-05 05:12:19,467 INFO L226 Difference]: Without dead ends: 5813 [2021-06-05 05:12:19,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1438.8ms TimeCoverageRelationStatistics Valid=322, Invalid=1934, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:12:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5813 states. [2021-06-05 05:12:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5813 to 4724. [2021-06-05 05:12:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 4.517044251535041) internal successors, (21334), 4723 states have internal predecessors, (21334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 21334 transitions. [2021-06-05 05:12:19,549 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 21334 transitions. Word has length 30 [2021-06-05 05:12:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:19,549 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 21334 transitions. [2021-06-05 05:12:19,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 21334 transitions. [2021-06-05 05:12:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:19,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:19,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:19,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 05:12:19,764 INFO L430 AbstractCegarLoop]: === Iteration 143 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:19,764 INFO L82 PathProgramCache]: Analyzing trace with hash -577755132, now seen corresponding path program 11 times [2021-06-05 05:12:19,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:19,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883449931] [2021-06-05 05:12:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:19,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:19,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883449931] [2021-06-05 05:12:19,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883449931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:19,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166946317] [2021-06-05 05:12:19,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:19,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:19,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:20,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:20,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:20,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:20,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 05:12:20,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:20,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:20,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:20,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-05 05:12:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:20,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166946317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:20,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:20,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:12:20,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616646411] [2021-06-05 05:12:20,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:12:20,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:20,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:12:20,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:12:20,350 INFO L87 Difference]: Start difference. First operand 4724 states and 21334 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:21,780 INFO L93 Difference]: Finished difference Result 6083 states and 26763 transitions. [2021-06-05 05:12:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:12:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:21,793 INFO L225 Difference]: With dead ends: 6083 [2021-06-05 05:12:21,793 INFO L226 Difference]: Without dead ends: 6002 [2021-06-05 05:12:21,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1062.1ms TimeCoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:12:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-06-05 05:12:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 4732. [2021-06-05 05:12:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 4731 states have (on average 4.515113083914605) internal successors, (21361), 4731 states have internal predecessors, (21361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 21361 transitions. [2021-06-05 05:12:21,906 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 21361 transitions. Word has length 30 [2021-06-05 05:12:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:21,907 INFO L482 AbstractCegarLoop]: Abstraction has 4732 states and 21361 transitions. [2021-06-05 05:12:21,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 21361 transitions. [2021-06-05 05:12:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:21,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:21,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:22,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 05:12:22,116 INFO L430 AbstractCegarLoop]: === Iteration 144 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:22,116 INFO L82 PathProgramCache]: Analyzing trace with hash -346038464, now seen corresponding path program 12 times [2021-06-05 05:12:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:22,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077083738] [2021-06-05 05:12:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:22,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:22,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077083738] [2021-06-05 05:12:22,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077083738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6864645] [2021-06-05 05:12:22,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:22,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:22,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:22,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:22,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:22,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:22,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 05:12:22,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:22,565 INFO L628 ElimStorePlain]: treesize reduction 16, result has 63.6 percent of original size [2021-06-05 05:12:22,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2021-06-05 05:12:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:22,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6864645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:22,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:12:22,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048737379] [2021-06-05 05:12:22,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:12:22,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:22,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:12:22,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:12:22,688 INFO L87 Difference]: Start difference. First operand 4732 states and 21361 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:24,067 INFO L93 Difference]: Finished difference Result 6282 states and 27499 transitions. [2021-06-05 05:12:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:12:24,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:24,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:24,079 INFO L225 Difference]: With dead ends: 6282 [2021-06-05 05:12:24,079 INFO L226 Difference]: Without dead ends: 6064 [2021-06-05 05:12:24,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 932.2ms TimeCoverageRelationStatistics Valid=300, Invalid=1862, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:12:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-06-05 05:12:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 4747. [2021-06-05 05:12:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4747 states, 4746 states have (on average 4.51369574378424) internal successors, (21422), 4746 states have internal predecessors, (21422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 21422 transitions. [2021-06-05 05:12:24,160 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 21422 transitions. Word has length 30 [2021-06-05 05:12:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:24,161 INFO L482 AbstractCegarLoop]: Abstraction has 4747 states and 21422 transitions. [2021-06-05 05:12:24,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 21422 transitions. [2021-06-05 05:12:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:24,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:24,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:24,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:24,369 INFO L430 AbstractCegarLoop]: === Iteration 145 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:24,370 INFO L82 PathProgramCache]: Analyzing trace with hash -852384730, now seen corresponding path program 13 times [2021-06-05 05:12:24,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:24,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002967183] [2021-06-05 05:12:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:24,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002967183] [2021-06-05 05:12:24,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002967183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219426027] [2021-06-05 05:12:24,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:24,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:24,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:24,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:24,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:24,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:24,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:12:24,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:24,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:24,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:24,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 05:12:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:24,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219426027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:24,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:24,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:12:24,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285903719] [2021-06-05 05:12:24,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:24,891 INFO L87 Difference]: Start difference. First operand 4747 states and 21422 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:25,867 INFO L93 Difference]: Finished difference Result 5597 states and 24752 transitions. [2021-06-05 05:12:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:12:25,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:25,879 INFO L225 Difference]: With dead ends: 5597 [2021-06-05 05:12:25,879 INFO L226 Difference]: Without dead ends: 5524 [2021-06-05 05:12:25,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 660.7ms TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:12:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-06-05 05:12:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 4739. [2021-06-05 05:12:25,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4739 states, 4738 states have (on average 4.515618404390038) internal successors, (21395), 4738 states have internal predecessors, (21395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 21395 transitions. [2021-06-05 05:12:25,965 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 21395 transitions. Word has length 30 [2021-06-05 05:12:25,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:25,965 INFO L482 AbstractCegarLoop]: Abstraction has 4739 states and 21395 transitions. [2021-06-05 05:12:25,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 21395 transitions. [2021-06-05 05:12:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:25,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:25,973 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:26,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 05:12:26,173 INFO L430 AbstractCegarLoop]: === Iteration 146 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash 496859426, now seen corresponding path program 14 times [2021-06-05 05:12:26,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:26,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331140021] [2021-06-05 05:12:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:26,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:26,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331140021] [2021-06-05 05:12:26,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331140021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687167351] [2021-06-05 05:12:26,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:26,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:26,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:26,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:12:26,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:26,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:26,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:26,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:12:26,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:26,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:26,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:26,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 05:12:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:26,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687167351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:26,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:12:26,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948019524] [2021-06-05 05:12:26,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:26,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:26,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:26,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:26,885 INFO L87 Difference]: Start difference. First operand 4739 states and 21395 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:29,041 INFO L93 Difference]: Finished difference Result 5199 states and 23063 transitions. [2021-06-05 05:12:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:12:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:29,053 INFO L225 Difference]: With dead ends: 5199 [2021-06-05 05:12:29,054 INFO L226 Difference]: Without dead ends: 5116 [2021-06-05 05:12:29,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1565.1ms TimeCoverageRelationStatistics Valid=234, Invalid=1836, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:12:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-06-05 05:12:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 4742. [2021-06-05 05:12:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4742 states, 4741 states have (on average 4.515292132461506) internal successors, (21407), 4741 states have internal predecessors, (21407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4742 states to 4742 states and 21407 transitions. [2021-06-05 05:12:29,130 INFO L78 Accepts]: Start accepts. Automaton has 4742 states and 21407 transitions. Word has length 30 [2021-06-05 05:12:29,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:29,130 INFO L482 AbstractCegarLoop]: Abstraction has 4742 states and 21407 transitions. [2021-06-05 05:12:29,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4742 states and 21407 transitions. [2021-06-05 05:12:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:29,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:29,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:29,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:29,357 INFO L430 AbstractCegarLoop]: === Iteration 147 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash -898727650, now seen corresponding path program 15 times [2021-06-05 05:12:29,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:29,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039227081] [2021-06-05 05:12:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:29,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:29,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039227081] [2021-06-05 05:12:29,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039227081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:29,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201262804] [2021-06-05 05:12:29,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:29,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:29,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:29,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:12:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:29,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:29,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:29,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:12:29,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:29,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:29,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:29,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 05:12:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:30,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201262804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:30,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:30,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:12:30,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536886525] [2021-06-05 05:12:30,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:30,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:30,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:30,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:30,001 INFO L87 Difference]: Start difference. First operand 4742 states and 21407 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:32,004 INFO L93 Difference]: Finished difference Result 5407 states and 23822 transitions. [2021-06-05 05:12:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:12:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:32,015 INFO L225 Difference]: With dead ends: 5407 [2021-06-05 05:12:32,015 INFO L226 Difference]: Without dead ends: 5245 [2021-06-05 05:12:32,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1576.6ms TimeCoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:12:32,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2021-06-05 05:12:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 4743. [2021-06-05 05:12:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4742 states have (on average 4.51602699283003) internal successors, (21415), 4742 states have internal predecessors, (21415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 21415 transitions. [2021-06-05 05:12:32,090 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 21415 transitions. Word has length 30 [2021-06-05 05:12:32,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:32,091 INFO L482 AbstractCegarLoop]: Abstraction has 4743 states and 21415 transitions. [2021-06-05 05:12:32,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 21415 transitions. [2021-06-05 05:12:32,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:32,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:32,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:32,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 05:12:32,299 INFO L430 AbstractCegarLoop]: === Iteration 148 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:32,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:32,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1262431236, now seen corresponding path program 16 times [2021-06-05 05:12:32,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:32,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133522600] [2021-06-05 05:12:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:32,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:32,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133522600] [2021-06-05 05:12:32,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133522600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:32,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182029050] [2021-06-05 05:12:32,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:32,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:32,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:32,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:32,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:32,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:32,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:12:32,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:32,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:32,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:32,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:12:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:32,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182029050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:32,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:32,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:12:32,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333256427] [2021-06-05 05:12:32,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:12:32,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:32,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:12:32,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:32,812 INFO L87 Difference]: Start difference. First operand 4743 states and 21415 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:33,829 INFO L93 Difference]: Finished difference Result 5359 states and 23831 transitions. [2021-06-05 05:12:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:33,829 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:33,841 INFO L225 Difference]: With dead ends: 5359 [2021-06-05 05:12:33,841 INFO L226 Difference]: Without dead ends: 5286 [2021-06-05 05:12:33,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 725.7ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-06-05 05:12:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4748. [2021-06-05 05:12:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4748 states, 4747 states have (on average 4.515904781967558) internal successors, (21437), 4747 states have internal predecessors, (21437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 21437 transitions. [2021-06-05 05:12:33,918 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 21437 transitions. Word has length 30 [2021-06-05 05:12:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:33,918 INFO L482 AbstractCegarLoop]: Abstraction has 4748 states and 21437 transitions. [2021-06-05 05:12:33,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 21437 transitions. [2021-06-05 05:12:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:33,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:33,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:34,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 05:12:34,126 INFO L430 AbstractCegarLoop]: === Iteration 149 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:34,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1795188218, now seen corresponding path program 17 times [2021-06-05 05:12:34,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:34,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565864215] [2021-06-05 05:12:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:34,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:34,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565864215] [2021-06-05 05:12:34,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565864215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246401211] [2021-06-05 05:12:34,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:34,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:12:34,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:34,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:34,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:34,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 05:12:34,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:34,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:34,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:34,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:245 [2021-06-05 05:12:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:34,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246401211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:34,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:12:34,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600240148] [2021-06-05 05:12:34,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:34,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:34,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:34,990 INFO L87 Difference]: Start difference. First operand 4748 states and 21437 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:36,186 INFO L93 Difference]: Finished difference Result 5571 states and 24814 transitions. [2021-06-05 05:12:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:36,186 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:36,199 INFO L225 Difference]: With dead ends: 5571 [2021-06-05 05:12:36,199 INFO L226 Difference]: Without dead ends: 5534 [2021-06-05 05:12:36,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1166.6ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:12:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5534 states. [2021-06-05 05:12:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5534 to 4751. [2021-06-05 05:12:36,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4751 states, 4750 states have (on average 4.514947368421053) internal successors, (21446), 4750 states have internal predecessors, (21446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4751 states to 4751 states and 21446 transitions. [2021-06-05 05:12:36,282 INFO L78 Accepts]: Start accepts. Automaton has 4751 states and 21446 transitions. Word has length 30 [2021-06-05 05:12:36,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:36,282 INFO L482 AbstractCegarLoop]: Abstraction has 4751 states and 21446 transitions. [2021-06-05 05:12:36,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4751 states and 21446 transitions. [2021-06-05 05:12:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:36,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:36,289 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:36,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 05:12:36,490 INFO L430 AbstractCegarLoop]: === Iteration 150 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:36,490 INFO L82 PathProgramCache]: Analyzing trace with hash -913654306, now seen corresponding path program 18 times [2021-06-05 05:12:36,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:36,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43133186] [2021-06-05 05:12:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:36,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:36,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43133186] [2021-06-05 05:12:36,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43133186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:36,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761819972] [2021-06-05 05:12:36,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:36,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:36,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:36,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:36,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:36,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:36,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:36,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:36,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:12:36,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:36,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 05:12:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:37,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761819972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:37,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:37,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:12:37,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688499350] [2021-06-05 05:12:37,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:12:37,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:37,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:12:37,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:12:37,123 INFO L87 Difference]: Start difference. First operand 4751 states and 21446 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:39,099 INFO L93 Difference]: Finished difference Result 5714 states and 25269 transitions. [2021-06-05 05:12:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:12:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:39,111 INFO L225 Difference]: With dead ends: 5714 [2021-06-05 05:12:39,111 INFO L226 Difference]: Without dead ends: 5617 [2021-06-05 05:12:39,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1468.3ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:12:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-06-05 05:12:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 4769. [2021-06-05 05:12:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 4.512374161073826) internal successors, (21515), 4768 states have internal predecessors, (21515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 21515 transitions. [2021-06-05 05:12:39,196 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 21515 transitions. Word has length 30 [2021-06-05 05:12:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:39,196 INFO L482 AbstractCegarLoop]: Abstraction has 4769 states and 21515 transitions. [2021-06-05 05:12:39,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 21515 transitions. [2021-06-05 05:12:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:39,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:39,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:39,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:39,404 INFO L430 AbstractCegarLoop]: === Iteration 151 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash 654044294, now seen corresponding path program 19 times [2021-06-05 05:12:39,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:39,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140549623] [2021-06-05 05:12:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:39,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140549623] [2021-06-05 05:12:39,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140549623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809844624] [2021-06-05 05:12:39,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:39,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:39,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:39,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:39,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:39,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:39,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:12:39,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:39,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:39,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:39,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:12:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809844624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:39,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:12:39,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226380375] [2021-06-05 05:12:39,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:39,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:39,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:39,892 INFO L87 Difference]: Start difference. First operand 4769 states and 21515 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:40,925 INFO L93 Difference]: Finished difference Result 5387 states and 23969 transitions. [2021-06-05 05:12:40,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:12:40,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:40,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:40,938 INFO L225 Difference]: With dead ends: 5387 [2021-06-05 05:12:40,938 INFO L226 Difference]: Without dead ends: 5306 [2021-06-05 05:12:40,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 835.6ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:12:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2021-06-05 05:12:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 4769. [2021-06-05 05:12:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 4.512374161073826) internal successors, (21515), 4768 states have internal predecessors, (21515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 21515 transitions. [2021-06-05 05:12:41,015 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 21515 transitions. Word has length 30 [2021-06-05 05:12:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:41,016 INFO L482 AbstractCegarLoop]: Abstraction has 4769 states and 21515 transitions. [2021-06-05 05:12:41,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 21515 transitions. [2021-06-05 05:12:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:41,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:41,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:41,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 05:12:41,224 INFO L430 AbstractCegarLoop]: === Iteration 152 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:41,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1896558996, now seen corresponding path program 20 times [2021-06-05 05:12:41,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:41,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190471105] [2021-06-05 05:12:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:41,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190471105] [2021-06-05 05:12:41,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190471105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653127021] [2021-06-05 05:12:41,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:41,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:41,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:12:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:41,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:41,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:41,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:12:41,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:41,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:41,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:41,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 05:12:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653127021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:41,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:12:41,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106417346] [2021-06-05 05:12:41,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:41,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:41,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:41,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:41,952 INFO L87 Difference]: Start difference. First operand 4769 states and 21515 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:43,939 INFO L93 Difference]: Finished difference Result 5234 states and 23220 transitions. [2021-06-05 05:12:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:12:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:43,949 INFO L225 Difference]: With dead ends: 5234 [2021-06-05 05:12:43,949 INFO L226 Difference]: Without dead ends: 5153 [2021-06-05 05:12:43,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1521.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:12:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5153 states. [2021-06-05 05:12:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5153 to 4767. [2021-06-05 05:12:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4767 states, 4766 states have (on average 4.513008812421318) internal successors, (21509), 4766 states have internal predecessors, (21509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4767 states to 4767 states and 21509 transitions. [2021-06-05 05:12:44,018 INFO L78 Accepts]: Start accepts. Automaton has 4767 states and 21509 transitions. Word has length 30 [2021-06-05 05:12:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:44,018 INFO L482 AbstractCegarLoop]: Abstraction has 4767 states and 21509 transitions. [2021-06-05 05:12:44,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4767 states and 21509 transitions. [2021-06-05 05:12:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:44,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:44,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:44,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 05:12:44,226 INFO L430 AbstractCegarLoop]: === Iteration 153 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:44,226 INFO L82 PathProgramCache]: Analyzing trace with hash -474649468, now seen corresponding path program 21 times [2021-06-05 05:12:44,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:44,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696539156] [2021-06-05 05:12:44,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:44,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:44,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696539156] [2021-06-05 05:12:44,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696539156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830309606] [2021-06-05 05:12:44,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:44,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:12:44,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:44,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:12:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:44,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:44,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:12:44,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:44,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:44,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:44,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:12:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:44,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830309606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:44,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:12:44,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549961908] [2021-06-05 05:12:44,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:44,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:44,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:44,788 INFO L87 Difference]: Start difference. First operand 4767 states and 21509 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:46,907 INFO L93 Difference]: Finished difference Result 6960 states and 29725 transitions. [2021-06-05 05:12:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:12:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:46,921 INFO L225 Difference]: With dead ends: 6960 [2021-06-05 05:12:46,921 INFO L226 Difference]: Without dead ends: 6417 [2021-06-05 05:12:46,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1680.7ms TimeCoverageRelationStatistics Valid=460, Invalid=3080, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:12:46,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6417 states. [2021-06-05 05:12:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6417 to 4819. [2021-06-05 05:12:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4819 states, 4818 states have (on average 4.5097550850975505) internal successors, (21728), 4818 states have internal predecessors, (21728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4819 states to 4819 states and 21728 transitions. [2021-06-05 05:12:47,005 INFO L78 Accepts]: Start accepts. Automaton has 4819 states and 21728 transitions. Word has length 30 [2021-06-05 05:12:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:47,005 INFO L482 AbstractCegarLoop]: Abstraction has 4819 states and 21728 transitions. [2021-06-05 05:12:47,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4819 states and 21728 transitions. [2021-06-05 05:12:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:47,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:47,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:47,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:47,217 INFO L430 AbstractCegarLoop]: === Iteration 154 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1870236544, now seen corresponding path program 22 times [2021-06-05 05:12:47,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:47,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522927809] [2021-06-05 05:12:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:47,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:47,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522927809] [2021-06-05 05:12:47,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522927809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:47,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577903393] [2021-06-05 05:12:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:47,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:47,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:47,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:12:47,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:47,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:47,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:47,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:12:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:47,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577903393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:47,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:47,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:12:47,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963024269] [2021-06-05 05:12:47,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:47,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:47,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:47,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:47,802 INFO L87 Difference]: Start difference. First operand 4819 states and 21728 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:49,900 INFO L93 Difference]: Finished difference Result 6585 states and 28786 transitions. [2021-06-05 05:12:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:12:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:49,913 INFO L225 Difference]: With dead ends: 6585 [2021-06-05 05:12:49,913 INFO L226 Difference]: Without dead ends: 6502 [2021-06-05 05:12:49,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1568.5ms TimeCoverageRelationStatistics Valid=519, Invalid=2903, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:12:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6502 states. [2021-06-05 05:12:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6502 to 4819. [2021-06-05 05:12:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4819 states, 4818 states have (on average 4.5097550850975505) internal successors, (21728), 4818 states have internal predecessors, (21728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4819 states to 4819 states and 21728 transitions. [2021-06-05 05:12:49,997 INFO L78 Accepts]: Start accepts. Automaton has 4819 states and 21728 transitions. Word has length 30 [2021-06-05 05:12:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:49,997 INFO L482 AbstractCegarLoop]: Abstraction has 4819 states and 21728 transitions. [2021-06-05 05:12:49,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4819 states and 21728 transitions. [2021-06-05 05:12:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:50,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:50,005 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:50,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 05:12:50,206 INFO L430 AbstractCegarLoop]: === Iteration 155 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:50,206 INFO L82 PathProgramCache]: Analyzing trace with hash -576259924, now seen corresponding path program 23 times [2021-06-05 05:12:50,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:50,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604947125] [2021-06-05 05:12:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:50,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:50,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604947125] [2021-06-05 05:12:50,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604947125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132826991] [2021-06-05 05:12:50,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:50,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:50,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:50,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:50,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:50,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 05:12:50,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:50,718 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-05 05:12:50,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:50,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 05:12:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:50,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132826991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:50,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:12:50,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334868018] [2021-06-05 05:12:50,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:50,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:50,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:50,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:50,803 INFO L87 Difference]: Start difference. First operand 4819 states and 21728 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:52,324 INFO L93 Difference]: Finished difference Result 6404 states and 27903 transitions. [2021-06-05 05:12:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:12:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:52,337 INFO L225 Difference]: With dead ends: 6404 [2021-06-05 05:12:52,338 INFO L226 Difference]: Without dead ends: 6092 [2021-06-05 05:12:52,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1039.0ms TimeCoverageRelationStatistics Valid=287, Invalid=1783, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:12:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6092 states. [2021-06-05 05:12:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6092 to 4829. [2021-06-05 05:12:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 4.508285004142502) internal successors, (21766), 4828 states have internal predecessors, (21766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 21766 transitions. [2021-06-05 05:12:52,422 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 21766 transitions. Word has length 30 [2021-06-05 05:12:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:52,422 INFO L482 AbstractCegarLoop]: Abstraction has 4829 states and 21766 transitions. [2021-06-05 05:12:52,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 21766 transitions. [2021-06-05 05:12:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:52,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:52,432 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:52,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 05:12:52,655 INFO L430 AbstractCegarLoop]: === Iteration 156 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:52,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1241192846, now seen corresponding path program 22 times [2021-06-05 05:12:52,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:52,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159011311] [2021-06-05 05:12:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:52,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:52,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159011311] [2021-06-05 05:12:52,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159011311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:52,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055845476] [2021-06-05 05:12:52,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:52,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:52,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:12:53,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:53,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:53,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:53,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:12:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:53,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055845476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:53,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:53,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:12:53,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333766503] [2021-06-05 05:12:53,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:53,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:53,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:53,048 INFO L87 Difference]: Start difference. First operand 4829 states and 21766 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:54,288 INFO L93 Difference]: Finished difference Result 7081 states and 30883 transitions. [2021-06-05 05:12:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:12:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:54,305 INFO L225 Difference]: With dead ends: 7081 [2021-06-05 05:12:54,305 INFO L226 Difference]: Without dead ends: 6899 [2021-06-05 05:12:54,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 909.8ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:12:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-05 05:12:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4893. [2021-06-05 05:12:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 4.507563368765331) internal successors, (22051), 4892 states have internal predecessors, (22051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 22051 transitions. [2021-06-05 05:12:54,409 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 22051 transitions. Word has length 30 [2021-06-05 05:12:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:54,409 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 22051 transitions. [2021-06-05 05:12:54,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 22051 transitions. [2021-06-05 05:12:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:54,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:54,418 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:54,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:54,618 INFO L430 AbstractCegarLoop]: === Iteration 157 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:54,618 INFO L82 PathProgramCache]: Analyzing trace with hash 829264932, now seen corresponding path program 23 times [2021-06-05 05:12:54,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:54,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299574439] [2021-06-05 05:12:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:54,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:54,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299574439] [2021-06-05 05:12:54,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299574439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:54,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223892107] [2021-06-05 05:12:54,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:54,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:12:54,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:55,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:55,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 05:12:55,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:55,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:55,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:55,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:217 [2021-06-05 05:12:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:55,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223892107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:55,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:55,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:12:55,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403876651] [2021-06-05 05:12:55,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:55,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:55,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:55,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:55,182 INFO L87 Difference]: Start difference. First operand 4893 states and 22051 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:56,558 INFO L93 Difference]: Finished difference Result 6033 states and 26549 transitions. [2021-06-05 05:12:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:12:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:56,571 INFO L225 Difference]: With dead ends: 6033 [2021-06-05 05:12:56,571 INFO L226 Difference]: Without dead ends: 5942 [2021-06-05 05:12:56,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:12:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2021-06-05 05:12:56,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 4910. [2021-06-05 05:12:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4909 states have (on average 4.506416785496028) internal successors, (22122), 4909 states have internal predecessors, (22122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 22122 transitions. [2021-06-05 05:12:56,652 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 22122 transitions. Word has length 30 [2021-06-05 05:12:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:56,652 INFO L482 AbstractCegarLoop]: Abstraction has 4910 states and 22122 transitions. [2021-06-05 05:12:56,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 22122 transitions. [2021-06-05 05:12:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:56,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:56,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:56,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:56,860 INFO L430 AbstractCegarLoop]: === Iteration 158 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1504446866, now seen corresponding path program 24 times [2021-06-05 05:12:56,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:56,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305875288] [2021-06-05 05:12:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:57,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305875288] [2021-06-05 05:12:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305875288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272641601] [2021-06-05 05:12:57,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:57,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:12:57,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:12:57,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:57,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:57,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:12:57,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:57,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:57,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:57,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:12:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:57,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272641601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:57,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:12:57,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365957062] [2021-06-05 05:12:57,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:57,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:57,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:57,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:57,337 INFO L87 Difference]: Start difference. First operand 4910 states and 22122 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:58,966 INFO L93 Difference]: Finished difference Result 6939 states and 30023 transitions. [2021-06-05 05:12:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:12:58,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:58,981 INFO L225 Difference]: With dead ends: 6939 [2021-06-05 05:12:58,981 INFO L226 Difference]: Without dead ends: 6759 [2021-06-05 05:12:58,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1225.6ms TimeCoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:12:58,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6759 states. [2021-06-05 05:12:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6759 to 4930. [2021-06-05 05:12:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4929 states have (on average 4.504564820450396) internal successors, (22203), 4929 states have internal predecessors, (22203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 22203 transitions. [2021-06-05 05:12:59,068 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 22203 transitions. Word has length 30 [2021-06-05 05:12:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:59,068 INFO L482 AbstractCegarLoop]: Abstraction has 4930 states and 22203 transitions. [2021-06-05 05:12:59,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 22203 transitions. [2021-06-05 05:12:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:59,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:59,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:59,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:59,276 INFO L430 AbstractCegarLoop]: === Iteration 159 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:59,276 INFO L82 PathProgramCache]: Analyzing trace with hash 296507950, now seen corresponding path program 25 times [2021-06-05 05:12:59,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:59,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330455777] [2021-06-05 05:12:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:59,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:59,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330455777] [2021-06-05 05:12:59,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330455777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:59,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894094122] [2021-06-05 05:12:59,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:59,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:12:59,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:59,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:59,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:59,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:12:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:59,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894094122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:59,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:59,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:12:59,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841740164] [2021-06-05 05:12:59,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:12:59,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:59,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:12:59,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:59,710 INFO L87 Difference]: Start difference. First operand 4930 states and 22203 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:00,771 INFO L93 Difference]: Finished difference Result 6471 states and 28440 transitions. [2021-06-05 05:13:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:13:00,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:00,785 INFO L225 Difference]: With dead ends: 6471 [2021-06-05 05:13:00,785 INFO L226 Difference]: Without dead ends: 6389 [2021-06-05 05:13:00,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:13:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6389 states. [2021-06-05 05:13:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6389 to 4922. [2021-06-05 05:13:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4922 states, 4921 states have (on average 4.5053850843324525) internal successors, (22171), 4921 states have internal predecessors, (22171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 22171 transitions. [2021-06-05 05:13:00,870 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 22171 transitions. Word has length 30 [2021-06-05 05:13:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:00,870 INFO L482 AbstractCegarLoop]: Abstraction has 4922 states and 22171 transitions. [2021-06-05 05:13:00,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 22171 transitions. [2021-06-05 05:13:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:00,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:00,878 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:01,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 05:13:01,078 INFO L430 AbstractCegarLoop]: === Iteration 160 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:01,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1041929016, now seen corresponding path program 24 times [2021-06-05 05:13:01,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:01,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142122365] [2021-06-05 05:13:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:01,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142122365] [2021-06-05 05:13:01,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142122365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26736809] [2021-06-05 05:13:01,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:01,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:13:01,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:01,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:01,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:01,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:01,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:01,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:01,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:13:01,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:01,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:01,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:01,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 05:13:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:01,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26736809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:01,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:01,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:13:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460624744] [2021-06-05 05:13:01,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:01,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:01,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:01,587 INFO L87 Difference]: Start difference. First operand 4922 states and 22171 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:04,212 INFO L93 Difference]: Finished difference Result 6213 states and 27211 transitions. [2021-06-05 05:13:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:13:04,213 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:04,225 INFO L225 Difference]: With dead ends: 6213 [2021-06-05 05:13:04,226 INFO L226 Difference]: Without dead ends: 6108 [2021-06-05 05:13:04,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 2105.7ms TimeCoverageRelationStatistics Valid=527, Invalid=3505, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:13:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2021-06-05 05:13:04,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 4943. [2021-06-05 05:13:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4943 states, 4942 states have (on average 4.504249291784703) internal successors, (22260), 4942 states have internal predecessors, (22260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 22260 transitions. [2021-06-05 05:13:04,310 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 22260 transitions. Word has length 30 [2021-06-05 05:13:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:04,310 INFO L482 AbstractCegarLoop]: Abstraction has 4943 states and 22260 transitions. [2021-06-05 05:13:04,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 22260 transitions. [2021-06-05 05:13:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:04,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:04,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:04,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:04,519 INFO L430 AbstractCegarLoop]: === Iteration 161 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:04,519 INFO L82 PathProgramCache]: Analyzing trace with hash 206885112, now seen corresponding path program 25 times [2021-06-05 05:13:04,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:04,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053234627] [2021-06-05 05:13:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:04,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:04,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053234627] [2021-06-05 05:13:04,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053234627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:04,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778188649] [2021-06-05 05:13:04,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:04,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:04,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:04,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:04,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:04,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:13:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:05,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778188649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:05,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:05,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:13:05,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538384904] [2021-06-05 05:13:05,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:05,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:05,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:05,015 INFO L87 Difference]: Start difference. First operand 4943 states and 22260 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:06,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:06,422 INFO L93 Difference]: Finished difference Result 6346 states and 27939 transitions. [2021-06-05 05:13:06,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:13:06,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:06,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:06,435 INFO L225 Difference]: With dead ends: 6346 [2021-06-05 05:13:06,436 INFO L226 Difference]: Without dead ends: 6300 [2021-06-05 05:13:06,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1178.0ms TimeCoverageRelationStatistics Valid=336, Invalid=1734, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:13:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-06-05 05:13:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4925. [2021-06-05 05:13:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4925 states, 4924 states have (on average 4.505077173030057) internal successors, (22183), 4924 states have internal predecessors, (22183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4925 states to 4925 states and 22183 transitions. [2021-06-05 05:13:06,519 INFO L78 Accepts]: Start accepts. Automaton has 4925 states and 22183 transitions. Word has length 30 [2021-06-05 05:13:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:06,519 INFO L482 AbstractCegarLoop]: Abstraction has 4925 states and 22183 transitions. [2021-06-05 05:13:06,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4925 states and 22183 transitions. [2021-06-05 05:13:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:06,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:06,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:06,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 05:13:06,728 INFO L430 AbstractCegarLoop]: === Iteration 162 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:06,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1857451204, now seen corresponding path program 26 times [2021-06-05 05:13:06,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:06,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623644884] [2021-06-05 05:13:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:06,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623644884] [2021-06-05 05:13:06,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623644884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351803316] [2021-06-05 05:13:06,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:06,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:06,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:07,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:07,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:13:07,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:07,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:07,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:07,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:13:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:07,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351803316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:07,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:07,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:13:07,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904719141] [2021-06-05 05:13:07,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:07,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:07,196 INFO L87 Difference]: Start difference. First operand 4925 states and 22183 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:09,374 INFO L93 Difference]: Finished difference Result 6806 states and 29667 transitions. [2021-06-05 05:13:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:13:09,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:09,389 INFO L225 Difference]: With dead ends: 6806 [2021-06-05 05:13:09,389 INFO L226 Difference]: Without dead ends: 6608 [2021-06-05 05:13:09,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1651.0ms TimeCoverageRelationStatistics Valid=532, Invalid=3250, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:13:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-06-05 05:13:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 4937. [2021-06-05 05:13:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 4.5040518638573745) internal successors, (22232), 4936 states have internal predecessors, (22232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 22232 transitions. [2021-06-05 05:13:09,476 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 22232 transitions. Word has length 30 [2021-06-05 05:13:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:09,476 INFO L482 AbstractCegarLoop]: Abstraction has 4937 states and 22232 transitions. [2021-06-05 05:13:09,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 22232 transitions. [2021-06-05 05:13:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:09,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:09,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:09,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 05:13:09,685 INFO L430 AbstractCegarLoop]: === Iteration 163 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1493747618, now seen corresponding path program 27 times [2021-06-05 05:13:09,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:09,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24427263] [2021-06-05 05:13:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:09,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:09,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24427263] [2021-06-05 05:13:09,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24427263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:09,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867263039] [2021-06-05 05:13:09,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:09,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:13:09,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:09,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:09,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:13:09,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:09,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:09,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:09,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:13:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:10,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867263039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:10,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:10,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:13:10,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412089423] [2021-06-05 05:13:10,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:10,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:10,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:10,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:10,114 INFO L87 Difference]: Start difference. First operand 4937 states and 22232 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:12,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:12,145 INFO L93 Difference]: Finished difference Result 6655 states and 28959 transitions. [2021-06-05 05:13:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:13:12,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:12,158 INFO L225 Difference]: With dead ends: 6655 [2021-06-05 05:13:12,158 INFO L226 Difference]: Without dead ends: 6500 [2021-06-05 05:13:12,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1442.4ms TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:13:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6500 states. [2021-06-05 05:13:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6500 to 4951. [2021-06-05 05:13:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4951 states, 4950 states have (on average 4.502222222222223) internal successors, (22286), 4950 states have internal predecessors, (22286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4951 states to 4951 states and 22286 transitions. [2021-06-05 05:13:12,239 INFO L78 Accepts]: Start accepts. Automaton has 4951 states and 22286 transitions. Word has length 30 [2021-06-05 05:13:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:12,239 INFO L482 AbstractCegarLoop]: Abstraction has 4951 states and 22286 transitions. [2021-06-05 05:13:12,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4951 states and 22286 transitions. [2021-06-05 05:13:12,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:12,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:12,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:12,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:12,447 INFO L430 AbstractCegarLoop]: === Iteration 164 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash 960990636, now seen corresponding path program 28 times [2021-06-05 05:13:12,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:12,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003482911] [2021-06-05 05:13:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:12,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:12,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003482911] [2021-06-05 05:13:12,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003482911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:12,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759952498] [2021-06-05 05:13:12,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:12,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:12,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:12,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:12,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:12,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:12,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:12,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:12,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:13:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:12,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759952498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:12,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:12,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:13:12,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656510502] [2021-06-05 05:13:12,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:13:12,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:12,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:13:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:12,834 INFO L87 Difference]: Start difference. First operand 4951 states and 22286 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:13,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:13,959 INFO L93 Difference]: Finished difference Result 6344 states and 27927 transitions. [2021-06-05 05:13:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:13:13,960 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:13,972 INFO L225 Difference]: With dead ends: 6344 [2021-06-05 05:13:13,972 INFO L226 Difference]: Without dead ends: 6270 [2021-06-05 05:13:13,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:13:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6270 states. [2021-06-05 05:13:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6270 to 4946. [2021-06-05 05:13:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 4945 states have (on average 4.502325581395349) internal successors, (22264), 4945 states have internal predecessors, (22264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 22264 transitions. [2021-06-05 05:13:14,047 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 22264 transitions. Word has length 30 [2021-06-05 05:13:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:14,047 INFO L482 AbstractCegarLoop]: Abstraction has 4946 states and 22264 transitions. [2021-06-05 05:13:14,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 22264 transitions. [2021-06-05 05:13:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:14,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:14,055 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:14,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:14,256 INFO L430 AbstractCegarLoop]: === Iteration 165 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash -884744148, now seen corresponding path program 29 times [2021-06-05 05:13:14,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:14,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123227049] [2021-06-05 05:13:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:14,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:14,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123227049] [2021-06-05 05:13:14,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123227049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555744228] [2021-06-05 05:13:14,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:14,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:14,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:14,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:14,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:14,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:14,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 05:13:14,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:14,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:14,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:14,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-06-05 05:13:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:14,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555744228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:14,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:13:14,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419581491] [2021-06-05 05:13:14,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:14,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:14,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:14,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:14,655 INFO L87 Difference]: Start difference. First operand 4946 states and 22264 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:16,408 INFO L93 Difference]: Finished difference Result 6319 states and 27787 transitions. [2021-06-05 05:13:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:13:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:16,422 INFO L225 Difference]: With dead ends: 6319 [2021-06-05 05:13:16,422 INFO L226 Difference]: Without dead ends: 6238 [2021-06-05 05:13:16,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1213.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:13:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-06-05 05:13:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 4946. [2021-06-05 05:13:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 4945 states have (on average 4.502325581395349) internal successors, (22264), 4945 states have internal predecessors, (22264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 22264 transitions. [2021-06-05 05:13:16,506 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 22264 transitions. Word has length 30 [2021-06-05 05:13:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:16,506 INFO L482 AbstractCegarLoop]: Abstraction has 4946 states and 22264 transitions. [2021-06-05 05:13:16,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 22264 transitions. [2021-06-05 05:13:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:16,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:16,514 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:16,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:16,714 INFO L430 AbstractCegarLoop]: === Iteration 166 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash 859619858, now seen corresponding path program 30 times [2021-06-05 05:13:16,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:16,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050710061] [2021-06-05 05:13:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:16,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:16,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050710061] [2021-06-05 05:13:16,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050710061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:16,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79778064] [2021-06-05 05:13:16,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:16,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:17,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:17,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:17,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:17,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:13:17,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:17,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:17,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:17,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 05:13:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:17,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79778064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:17,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:17,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:13:17,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651850546] [2021-06-05 05:13:17,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:17,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:17,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:17,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:17,238 INFO L87 Difference]: Start difference. First operand 4946 states and 22264 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:18,699 INFO L93 Difference]: Finished difference Result 6391 states and 27888 transitions. [2021-06-05 05:13:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:13:18,700 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:18,712 INFO L225 Difference]: With dead ends: 6391 [2021-06-05 05:13:18,713 INFO L226 Difference]: Without dead ends: 6245 [2021-06-05 05:13:18,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1081.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:13:18,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6245 states. [2021-06-05 05:13:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6245 to 4945. [2021-06-05 05:13:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4945 states, 4944 states have (on average 4.502629449838188) internal successors, (22261), 4944 states have internal predecessors, (22261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4945 states to 4945 states and 22261 transitions. [2021-06-05 05:13:18,795 INFO L78 Accepts]: Start accepts. Automaton has 4945 states and 22261 transitions. Word has length 30 [2021-06-05 05:13:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:18,795 INFO L482 AbstractCegarLoop]: Abstraction has 4945 states and 22261 transitions. [2021-06-05 05:13:18,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4945 states and 22261 transitions. [2021-06-05 05:13:18,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:18,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:18,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:19,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:19,004 INFO L430 AbstractCegarLoop]: === Iteration 167 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:19,004 INFO L82 PathProgramCache]: Analyzing trace with hash 315030084, now seen corresponding path program 31 times [2021-06-05 05:13:19,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:19,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778402656] [2021-06-05 05:13:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:19,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778402656] [2021-06-05 05:13:19,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778402656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521883462] [2021-06-05 05:13:19,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:19,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:19,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:19,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:19,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:19,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:19,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:13:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:19,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521883462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:19,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:19,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:13:19,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795188523] [2021-06-05 05:13:19,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:19,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:19,381 INFO L87 Difference]: Start difference. First operand 4945 states and 22261 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:20,943 INFO L93 Difference]: Finished difference Result 6831 states and 29854 transitions. [2021-06-05 05:13:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:13:20,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:20,957 INFO L225 Difference]: With dead ends: 6831 [2021-06-05 05:13:20,957 INFO L226 Difference]: Without dead ends: 6649 [2021-06-05 05:13:20,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 972.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:13:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6649 states. [2021-06-05 05:13:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6649 to 4995. [2021-06-05 05:13:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4994 states have (on average 4.4987985582699235) internal successors, (22467), 4994 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 22467 transitions. [2021-06-05 05:13:21,046 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 22467 transitions. Word has length 30 [2021-06-05 05:13:21,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:21,046 INFO L482 AbstractCegarLoop]: Abstraction has 4995 states and 22467 transitions. [2021-06-05 05:13:21,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 22467 transitions. [2021-06-05 05:13:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:21,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:21,054 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:21,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:21,254 INFO L430 AbstractCegarLoop]: === Iteration 168 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:21,255 INFO L82 PathProgramCache]: Analyzing trace with hash -349902838, now seen corresponding path program 26 times [2021-06-05 05:13:21,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:21,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868165605] [2021-06-05 05:13:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:21,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:21,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868165605] [2021-06-05 05:13:21,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868165605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:21,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17218872] [2021-06-05 05:13:21,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:21,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:21,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:21,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:21,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:21,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:21,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 05:13:21,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:21,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:21,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:21,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 05:13:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:21,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17218872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:21,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:21,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:13:21,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418869390] [2021-06-05 05:13:21,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:13:21,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:21,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:13:21,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:21,686 INFO L87 Difference]: Start difference. First operand 4995 states and 22467 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:23,332 INFO L93 Difference]: Finished difference Result 7307 states and 31428 transitions. [2021-06-05 05:13:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:13:23,332 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:23,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:23,347 INFO L225 Difference]: With dead ends: 7307 [2021-06-05 05:13:23,348 INFO L226 Difference]: Without dead ends: 6981 [2021-06-05 05:13:23,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1098.1ms TimeCoverageRelationStatistics Valid=386, Invalid=2694, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:13:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6981 states. [2021-06-05 05:13:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6981 to 5027. [2021-06-05 05:13:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 5026 states have (on average 4.49641862315957) internal successors, (22599), 5026 states have internal predecessors, (22599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 22599 transitions. [2021-06-05 05:13:23,440 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 22599 transitions. Word has length 30 [2021-06-05 05:13:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:23,440 INFO L482 AbstractCegarLoop]: Abstraction has 5027 states and 22599 transitions. [2021-06-05 05:13:23,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 22599 transitions. [2021-06-05 05:13:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:23,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:23,448 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:23,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 05:13:23,648 INFO L430 AbstractCegarLoop]: === Iteration 169 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:23,649 INFO L82 PathProgramCache]: Analyzing trace with hash 573825408, now seen corresponding path program 32 times [2021-06-05 05:13:23,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:23,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606933666] [2021-06-05 05:13:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:23,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:23,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606933666] [2021-06-05 05:13:23,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606933666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:23,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265286426] [2021-06-05 05:13:23,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:23,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:23,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:23,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:23,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:23,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:23,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:13:23,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:24,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:24,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:24,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 05:13:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:24,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265286426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:24,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:24,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:13:24,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751108281] [2021-06-05 05:13:24,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:24,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:24,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:24,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:24,098 INFO L87 Difference]: Start difference. First operand 5027 states and 22599 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:25,893 INFO L93 Difference]: Finished difference Result 6903 states and 30068 transitions. [2021-06-05 05:13:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:13:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:25,908 INFO L225 Difference]: With dead ends: 6903 [2021-06-05 05:13:25,908 INFO L226 Difference]: Without dead ends: 6685 [2021-06-05 05:13:25,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1301.4ms TimeCoverageRelationStatistics Valid=392, Invalid=2364, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:13:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2021-06-05 05:13:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 5059. [2021-06-05 05:13:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5059 states, 5058 states have (on average 4.494266508501384) internal successors, (22732), 5058 states have internal predecessors, (22732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5059 states to 5059 states and 22732 transitions. [2021-06-05 05:13:25,994 INFO L78 Accepts]: Start accepts. Automaton has 5059 states and 22732 transitions. Word has length 30 [2021-06-05 05:13:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:25,994 INFO L482 AbstractCegarLoop]: Abstraction has 5059 states and 22732 transitions. [2021-06-05 05:13:25,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5059 states and 22732 transitions. [2021-06-05 05:13:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:26,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:26,002 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:26,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:26,203 INFO L430 AbstractCegarLoop]: === Iteration 170 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1976777882, now seen corresponding path program 33 times [2021-06-05 05:13:26,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:26,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900198598] [2021-06-05 05:13:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:26,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:26,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900198598] [2021-06-05 05:13:26,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900198598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:26,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698378871] [2021-06-05 05:13:26,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:26,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:26,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:26,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:26,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:26,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:26,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:13:26,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:26,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:26,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:26,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 05:13:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:26,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698378871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:26,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:26,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:13:26,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631909611] [2021-06-05 05:13:26,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:26,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:26,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:26,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:26,623 INFO L87 Difference]: Start difference. First operand 5059 states and 22732 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:28,150 INFO L93 Difference]: Finished difference Result 6673 states and 29070 transitions. [2021-06-05 05:13:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:13:28,150 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:28,164 INFO L225 Difference]: With dead ends: 6673 [2021-06-05 05:13:28,164 INFO L226 Difference]: Without dead ends: 6491 [2021-06-05 05:13:28,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1043.7ms TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:13:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6491 states. [2021-06-05 05:13:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6491 to 5037. [2021-06-05 05:13:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5037 states, 5036 states have (on average 4.4976171564733916) internal successors, (22650), 5036 states have internal predecessors, (22650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 22650 transitions. [2021-06-05 05:13:28,253 INFO L78 Accepts]: Start accepts. Automaton has 5037 states and 22650 transitions. Word has length 30 [2021-06-05 05:13:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:28,253 INFO L482 AbstractCegarLoop]: Abstraction has 5037 states and 22650 transitions. [2021-06-05 05:13:28,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states and 22650 transitions. [2021-06-05 05:13:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:28,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:28,261 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:28,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 05:13:28,462 INFO L430 AbstractCegarLoop]: === Iteration 171 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:28,462 INFO L82 PathProgramCache]: Analyzing trace with hash 902123386, now seen corresponding path program 56 times [2021-06-05 05:13:28,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:28,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269090610] [2021-06-05 05:13:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:28,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269090610] [2021-06-05 05:13:28,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269090610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:28,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920936084] [2021-06-05 05:13:28,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:28,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:28,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:28,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:28,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:28,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:28,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:28,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:13:28,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:28,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:28,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:28,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-05 05:13:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:29,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920936084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:29,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:29,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:13:29,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697750569] [2021-06-05 05:13:29,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:29,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:29,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:29,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:29,088 INFO L87 Difference]: Start difference. First operand 5037 states and 22650 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:31,134 INFO L93 Difference]: Finished difference Result 6614 states and 28524 transitions. [2021-06-05 05:13:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:13:31,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:31,148 INFO L225 Difference]: With dead ends: 6614 [2021-06-05 05:13:31,148 INFO L226 Difference]: Without dead ends: 6140 [2021-06-05 05:13:31,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1624.0ms TimeCoverageRelationStatistics Valid=375, Invalid=2075, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:13:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6140 states. [2021-06-05 05:13:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6140 to 5038. [2021-06-05 05:13:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5038 states, 5037 states have (on average 4.49811395672027) internal successors, (22657), 5037 states have internal predecessors, (22657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 22657 transitions. [2021-06-05 05:13:31,233 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 22657 transitions. Word has length 30 [2021-06-05 05:13:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:31,233 INFO L482 AbstractCegarLoop]: Abstraction has 5038 states and 22657 transitions. [2021-06-05 05:13:31,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 22657 transitions. [2021-06-05 05:13:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:31,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:31,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:31,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:31,445 INFO L430 AbstractCegarLoop]: === Iteration 172 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash -639544558, now seen corresponding path program 34 times [2021-06-05 05:13:31,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:31,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280840652] [2021-06-05 05:13:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:31,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:31,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280840652] [2021-06-05 05:13:31,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280840652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:31,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038516510] [2021-06-05 05:13:31,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:31,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:31,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:31,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:31,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:31,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:31,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:31,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:31,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:31,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:31,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:31,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:13:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:31,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038516510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:31,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:31,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 05:13:31,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810340609] [2021-06-05 05:13:31,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:13:31,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:31,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:13:31,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:13:31,960 INFO L87 Difference]: Start difference. First operand 5038 states and 22657 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:32,759 INFO L93 Difference]: Finished difference Result 5614 states and 24911 transitions. [2021-06-05 05:13:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:13:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:32,771 INFO L225 Difference]: With dead ends: 5614 [2021-06-05 05:13:32,771 INFO L226 Difference]: Without dead ends: 5568 [2021-06-05 05:13:32,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:13:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2021-06-05 05:13:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 5010. [2021-06-05 05:13:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 5009 states have (on average 4.501497304851267) internal successors, (22548), 5009 states have internal predecessors, (22548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 22548 transitions. [2021-06-05 05:13:32,850 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 22548 transitions. Word has length 30 [2021-06-05 05:13:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:32,850 INFO L482 AbstractCegarLoop]: Abstraction has 5010 states and 22548 transitions. [2021-06-05 05:13:32,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 22548 transitions. [2021-06-05 05:13:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:32,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:32,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:33,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:33,059 INFO L430 AbstractCegarLoop]: === Iteration 173 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:33,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1582606780, now seen corresponding path program 1 times [2021-06-05 05:13:33,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:33,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442296449] [2021-06-05 05:13:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:33,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:33,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442296449] [2021-06-05 05:13:33,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442296449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:33,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77906745] [2021-06-05 05:13:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:33,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:33,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:33,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:33,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:33,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:33,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:33,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:33,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:13:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:33,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77906745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:33,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:33,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:13:33,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51550459] [2021-06-05 05:13:33,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:13:33,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:13:33,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:13:33,445 INFO L87 Difference]: Start difference. First operand 5010 states and 22548 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:34,240 INFO L93 Difference]: Finished difference Result 5753 states and 25486 transitions. [2021-06-05 05:13:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:13:34,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:34,252 INFO L225 Difference]: With dead ends: 5753 [2021-06-05 05:13:34,252 INFO L226 Difference]: Without dead ends: 5680 [2021-06-05 05:13:34,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5680 states. [2021-06-05 05:13:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5680 to 5050. [2021-06-05 05:13:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5050 states, 5049 states have (on average 4.503862150920974) internal successors, (22740), 5049 states have internal predecessors, (22740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5050 states to 5050 states and 22740 transitions. [2021-06-05 05:13:34,388 INFO L78 Accepts]: Start accepts. Automaton has 5050 states and 22740 transitions. Word has length 30 [2021-06-05 05:13:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:34,388 INFO L482 AbstractCegarLoop]: Abstraction has 5050 states and 22740 transitions. [2021-06-05 05:13:34,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5050 states and 22740 transitions. [2021-06-05 05:13:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:34,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:34,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:34,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 05:13:34,598 INFO L430 AbstractCegarLoop]: === Iteration 174 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:34,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:34,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1186289438, now seen corresponding path program 2 times [2021-06-05 05:13:34,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:34,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92458468] [2021-06-05 05:13:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:34,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92458468] [2021-06-05 05:13:34,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92458468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640638279] [2021-06-05 05:13:34,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:34,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:34,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:34,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:34,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:34,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:34,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:34,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:34,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:13:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:34,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640638279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:34,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:34,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:13:34,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14470647] [2021-06-05 05:13:34,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:13:34,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:34,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:13:34,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:13:34,974 INFO L87 Difference]: Start difference. First operand 5050 states and 22740 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:35,662 INFO L93 Difference]: Finished difference Result 5776 states and 25601 transitions. [2021-06-05 05:13:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:13:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:35,679 INFO L225 Difference]: With dead ends: 5776 [2021-06-05 05:13:35,679 INFO L226 Difference]: Without dead ends: 5701 [2021-06-05 05:13:35,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-06-05 05:13:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 5040. [2021-06-05 05:13:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 5039 states have (on average 4.504465171661044) internal successors, (22698), 5039 states have internal predecessors, (22698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 22698 transitions. [2021-06-05 05:13:35,791 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 22698 transitions. Word has length 30 [2021-06-05 05:13:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:35,792 INFO L482 AbstractCegarLoop]: Abstraction has 5040 states and 22698 transitions. [2021-06-05 05:13:35,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 22698 transitions. [2021-06-05 05:13:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:35,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:35,800 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:36,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 05:13:36,001 INFO L430 AbstractCegarLoop]: === Iteration 175 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1423372772, now seen corresponding path program 1 times [2021-06-05 05:13:36,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:36,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435677227] [2021-06-05 05:13:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:36,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:36,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435677227] [2021-06-05 05:13:36,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435677227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429930258] [2021-06-05 05:13:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:36,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:36,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:36,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:36,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:36,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:36,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:36,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:36,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:13:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:36,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429930258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:36,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:36,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:13:36,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379332674] [2021-06-05 05:13:36,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:13:36,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:36,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:13:36,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:13:36,451 INFO L87 Difference]: Start difference. First operand 5040 states and 22698 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:37,063 INFO L93 Difference]: Finished difference Result 5575 states and 24791 transitions. [2021-06-05 05:13:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:13:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:37,074 INFO L225 Difference]: With dead ends: 5575 [2021-06-05 05:13:37,074 INFO L226 Difference]: Without dead ends: 5502 [2021-06-05 05:13:37,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2021-06-05 05:13:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 5061. [2021-06-05 05:13:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5061 states, 5060 states have (on average 4.502766798418972) internal successors, (22784), 5060 states have internal predecessors, (22784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5061 states to 5061 states and 22784 transitions. [2021-06-05 05:13:37,157 INFO L78 Accepts]: Start accepts. Automaton has 5061 states and 22784 transitions. Word has length 30 [2021-06-05 05:13:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:37,157 INFO L482 AbstractCegarLoop]: Abstraction has 5061 states and 22784 transitions. [2021-06-05 05:13:37,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 5061 states and 22784 transitions. [2021-06-05 05:13:37,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:37,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:37,165 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:37,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:37,366 INFO L430 AbstractCegarLoop]: === Iteration 176 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:37,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:37,366 INFO L82 PathProgramCache]: Analyzing trace with hash -802888706, now seen corresponding path program 2 times [2021-06-05 05:13:37,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:37,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641188157] [2021-06-05 05:13:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:37,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:37,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641188157] [2021-06-05 05:13:37,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641188157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:37,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127968636] [2021-06-05 05:13:37,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:37,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:37,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:37,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:37,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:37,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:37,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:37,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:37,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:37,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:37,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:37,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:37,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:13:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:37,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127968636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:37,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:37,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 05:13:37,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307035317] [2021-06-05 05:13:37,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:13:37,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:37,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:13:37,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:13:37,758 INFO L87 Difference]: Start difference. First operand 5061 states and 22784 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:38,544 INFO L93 Difference]: Finished difference Result 5603 states and 24937 transitions. [2021-06-05 05:13:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:13:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:38,556 INFO L225 Difference]: With dead ends: 5603 [2021-06-05 05:13:38,556 INFO L226 Difference]: Without dead ends: 5537 [2021-06-05 05:13:38,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:13:38,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2021-06-05 05:13:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 5056. [2021-06-05 05:13:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 4.503659742828883) internal successors, (22766), 5055 states have internal predecessors, (22766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 22766 transitions. [2021-06-05 05:13:38,638 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 22766 transitions. Word has length 30 [2021-06-05 05:13:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:38,639 INFO L482 AbstractCegarLoop]: Abstraction has 5056 states and 22766 transitions. [2021-06-05 05:13:38,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 22766 transitions. [2021-06-05 05:13:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:38,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:38,649 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:38,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 05:13:38,850 INFO L430 AbstractCegarLoop]: === Iteration 177 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1558152092, now seen corresponding path program 3 times [2021-06-05 05:13:38,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:38,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168692937] [2021-06-05 05:13:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:39,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:39,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168692937] [2021-06-05 05:13:39,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168692937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:39,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502102498] [2021-06-05 05:13:39,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:39,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:13:39,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:39,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:39,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 05:13:39,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:39,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:39,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:39,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-06-05 05:13:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:39,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502102498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:39,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:39,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:13:39,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47512535] [2021-06-05 05:13:39,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:39,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:39,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:39,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:39,415 INFO L87 Difference]: Start difference. First operand 5056 states and 22766 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:41,615 INFO L93 Difference]: Finished difference Result 5959 states and 26159 transitions. [2021-06-05 05:13:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:13:41,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:41,628 INFO L225 Difference]: With dead ends: 5959 [2021-06-05 05:13:41,628 INFO L226 Difference]: Without dead ends: 5827 [2021-06-05 05:13:41,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1548.9ms TimeCoverageRelationStatistics Valid=340, Invalid=2416, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:13:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5827 states. [2021-06-05 05:13:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5827 to 5055. [2021-06-05 05:13:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5055 states, 5054 states have (on average 4.50415512465374) internal successors, (22764), 5054 states have internal predecessors, (22764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5055 states to 5055 states and 22764 transitions. [2021-06-05 05:13:41,708 INFO L78 Accepts]: Start accepts. Automaton has 5055 states and 22764 transitions. Word has length 30 [2021-06-05 05:13:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:41,708 INFO L482 AbstractCegarLoop]: Abstraction has 5055 states and 22764 transitions. [2021-06-05 05:13:41,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5055 states and 22764 transitions. [2021-06-05 05:13:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:41,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:41,716 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:41,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 05:13:41,917 INFO L430 AbstractCegarLoop]: === Iteration 178 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:41,917 INFO L82 PathProgramCache]: Analyzing trace with hash 609639870, now seen corresponding path program 4 times [2021-06-05 05:13:41,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:41,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143770986] [2021-06-05 05:13:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:42,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:42,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143770986] [2021-06-05 05:13:42,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143770986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:42,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045654882] [2021-06-05 05:13:42,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:42,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:42,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:42,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:42,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:42,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:42,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:42,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:42,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:42,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:42,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:42,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:42,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:13:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:42,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045654882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:42,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:42,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:13:42,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268376730] [2021-06-05 05:13:42,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:13:42,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:13:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:42,394 INFO L87 Difference]: Start difference. First operand 5055 states and 22764 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:43,497 INFO L93 Difference]: Finished difference Result 5523 states and 24587 transitions. [2021-06-05 05:13:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:13:43,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:43,509 INFO L225 Difference]: With dead ends: 5523 [2021-06-05 05:13:43,509 INFO L226 Difference]: Without dead ends: 5450 [2021-06-05 05:13:43,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 749.7ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:13:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-06-05 05:13:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 5067. [2021-06-05 05:13:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 4.503553099091985) internal successors, (22815), 5066 states have internal predecessors, (22815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 22815 transitions. [2021-06-05 05:13:43,590 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 22815 transitions. Word has length 30 [2021-06-05 05:13:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:43,590 INFO L482 AbstractCegarLoop]: Abstraction has 5067 states and 22815 transitions. [2021-06-05 05:13:43,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 22815 transitions. [2021-06-05 05:13:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:43,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:43,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:43,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 05:13:43,799 INFO L430 AbstractCegarLoop]: === Iteration 179 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:43,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:43,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2135710948, now seen corresponding path program 5 times [2021-06-05 05:13:43,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:43,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678651709] [2021-06-05 05:13:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:43,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:43,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678651709] [2021-06-05 05:13:43,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678651709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:43,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524876555] [2021-06-05 05:13:43,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:44,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:44,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:44,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:44,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:44,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:44,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:44,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:44,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:44,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:44,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:44,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:13:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:44,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524876555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:44,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:44,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:13:44,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305980756] [2021-06-05 05:13:44,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:13:44,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:13:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:44,224 INFO L87 Difference]: Start difference. First operand 5067 states and 22815 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:45,009 INFO L93 Difference]: Finished difference Result 5623 states and 25015 transitions. [2021-06-05 05:13:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:13:45,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:45,022 INFO L225 Difference]: With dead ends: 5623 [2021-06-05 05:13:45,022 INFO L226 Difference]: Without dead ends: 5548 [2021-06-05 05:13:45,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 611.4ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:13:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5548 states. [2021-06-05 05:13:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5548 to 5058. [2021-06-05 05:13:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 5057 states have (on average 4.504053786830136) internal successors, (22777), 5057 states have internal predecessors, (22777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 22777 transitions. [2021-06-05 05:13:45,135 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 22777 transitions. Word has length 30 [2021-06-05 05:13:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:45,135 INFO L482 AbstractCegarLoop]: Abstraction has 5058 states and 22777 transitions. [2021-06-05 05:13:45,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 22777 transitions. [2021-06-05 05:13:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:45,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:45,144 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:45,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:45,344 INFO L430 AbstractCegarLoop]: === Iteration 180 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1940963420, now seen corresponding path program 6 times [2021-06-05 05:13:45,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:45,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869216406] [2021-06-05 05:13:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:45,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:45,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869216406] [2021-06-05 05:13:45,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869216406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:45,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997405007] [2021-06-05 05:13:45,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:45,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:13:45,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:45,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:45,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:45,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:45,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:45,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:45,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:45,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:45,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:45,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:13:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:45,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997405007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:45,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:45,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:13:45,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734057809] [2021-06-05 05:13:45,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:13:45,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:13:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:45,801 INFO L87 Difference]: Start difference. First operand 5058 states and 22777 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:46,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:46,598 INFO L93 Difference]: Finished difference Result 5489 states and 24458 transitions. [2021-06-05 05:13:46,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:13:46,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:46,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:46,609 INFO L225 Difference]: With dead ends: 5489 [2021-06-05 05:13:46,610 INFO L226 Difference]: Without dead ends: 5416 [2021-06-05 05:13:46,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 558.8ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:13:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2021-06-05 05:13:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 5064. [2021-06-05 05:13:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5064 states, 5063 states have (on average 4.503456448745803) internal successors, (22801), 5063 states have internal predecessors, (22801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 22801 transitions. [2021-06-05 05:13:46,691 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 22801 transitions. Word has length 30 [2021-06-05 05:13:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:46,691 INFO L482 AbstractCegarLoop]: Abstraction has 5064 states and 22801 transitions. [2021-06-05 05:13:46,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 22801 transitions. [2021-06-05 05:13:46,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:46,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:46,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:46,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2021-06-05 05:13:46,900 INFO L430 AbstractCegarLoop]: === Iteration 181 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1320479354, now seen corresponding path program 7 times [2021-06-05 05:13:46,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:46,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118932330] [2021-06-05 05:13:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:47,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118932330] [2021-06-05 05:13:47,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118932330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927115186] [2021-06-05 05:13:47,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:47,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:47,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:47,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:47,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:47,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:47,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:47,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:13:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:47,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927115186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:47,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:47,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 05:13:47,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426732215] [2021-06-05 05:13:47,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:13:47,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:47,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:13:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:13:47,351 INFO L87 Difference]: Start difference. First operand 5064 states and 22801 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:48,054 INFO L93 Difference]: Finished difference Result 5613 states and 24981 transitions. [2021-06-05 05:13:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:13:48,055 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:48,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:48,066 INFO L225 Difference]: With dead ends: 5613 [2021-06-05 05:13:48,066 INFO L226 Difference]: Without dead ends: 5547 [2021-06-05 05:13:48,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 486.9ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:13:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5547 states. [2021-06-05 05:13:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5547 to 5058. [2021-06-05 05:13:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 5057 states have (on average 4.504053786830136) internal successors, (22777), 5057 states have internal predecessors, (22777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 22777 transitions. [2021-06-05 05:13:48,145 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 22777 transitions. Word has length 30 [2021-06-05 05:13:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:48,145 INFO L482 AbstractCegarLoop]: Abstraction has 5058 states and 22777 transitions. [2021-06-05 05:13:48,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 22777 transitions. [2021-06-05 05:13:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:48,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:48,153 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:48,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:48,353 INFO L430 AbstractCegarLoop]: === Iteration 182 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:48,354 INFO L82 PathProgramCache]: Analyzing trace with hash -549216698, now seen corresponding path program 8 times [2021-06-05 05:13:48,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:48,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052571093] [2021-06-05 05:13:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:48,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:48,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052571093] [2021-06-05 05:13:48,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052571093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:48,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355208567] [2021-06-05 05:13:48,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:48,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:48,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:48,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:48,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:48,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:48,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:48,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:48,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:48,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:48,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:48,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:48,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:13:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:48,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355208567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:48,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:48,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:13:48,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578755875] [2021-06-05 05:13:48,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:48,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:48,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:48,900 INFO L87 Difference]: Start difference. First operand 5058 states and 22777 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:49,833 INFO L93 Difference]: Finished difference Result 5635 states and 25057 transitions. [2021-06-05 05:13:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:13:49,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:49,844 INFO L225 Difference]: With dead ends: 5635 [2021-06-05 05:13:49,844 INFO L226 Difference]: Without dead ends: 5564 [2021-06-05 05:13:49,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 785.8ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:13:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-06-05 05:13:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 5058. [2021-06-05 05:13:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 5057 states have (on average 4.504053786830136) internal successors, (22777), 5057 states have internal predecessors, (22777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 22777 transitions. [2021-06-05 05:13:49,927 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 22777 transitions. Word has length 30 [2021-06-05 05:13:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:49,927 INFO L482 AbstractCegarLoop]: Abstraction has 5058 states and 22777 transitions. [2021-06-05 05:13:49,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 22777 transitions. [2021-06-05 05:13:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:49,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:49,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:50,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 05:13:50,136 INFO L430 AbstractCegarLoop]: === Iteration 183 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:50,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1185683552, now seen corresponding path program 9 times [2021-06-05 05:13:50,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:50,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882045007] [2021-06-05 05:13:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:50,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:50,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882045007] [2021-06-05 05:13:50,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882045007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:50,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560940303] [2021-06-05 05:13:50,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:50,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:13:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:50,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:50,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:50,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:50,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:13:50,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:50,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:50,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:50,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:13:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:50,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560940303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:50,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:50,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:13:50,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352368558] [2021-06-05 05:13:50,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:50,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:50,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:50,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:50,614 INFO L87 Difference]: Start difference. First operand 5058 states and 22777 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:51,516 INFO L93 Difference]: Finished difference Result 5616 states and 24993 transitions. [2021-06-05 05:13:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:13:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:51,530 INFO L225 Difference]: With dead ends: 5616 [2021-06-05 05:13:51,530 INFO L226 Difference]: Without dead ends: 5552 [2021-06-05 05:13:51,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 634.3ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:13:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-06-05 05:13:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 5056. [2021-06-05 05:13:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 4.504253214638971) internal successors, (22769), 5055 states have internal predecessors, (22769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 22769 transitions. [2021-06-05 05:13:51,622 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 22769 transitions. Word has length 30 [2021-06-05 05:13:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:51,622 INFO L482 AbstractCegarLoop]: Abstraction has 5056 states and 22769 transitions. [2021-06-05 05:13:51,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 22769 transitions. [2021-06-05 05:13:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:51,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:51,631 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:51,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 05:13:51,832 INFO L430 AbstractCegarLoop]: === Iteration 184 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:51,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2049698712, now seen corresponding path program 3 times [2021-06-05 05:13:51,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:51,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471811453] [2021-06-05 05:13:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:51,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:51,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471811453] [2021-06-05 05:13:51,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471811453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:51,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251889530] [2021-06-05 05:13:51,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:51,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:51,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:51,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:51,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:52,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:52,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:52,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:52,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 05:13:52,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:52,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:52,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:52,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:93 [2021-06-05 05:13:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:52,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251889530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:52,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:52,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 05:13:52,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824776397] [2021-06-05 05:13:52,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:13:52,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:52,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:13:52,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:13:52,341 INFO L87 Difference]: Start difference. First operand 5056 states and 22769 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:53,397 INFO L93 Difference]: Finished difference Result 6020 states and 26497 transitions. [2021-06-05 05:13:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:13:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:53,410 INFO L225 Difference]: With dead ends: 6020 [2021-06-05 05:13:53,410 INFO L226 Difference]: Without dead ends: 5878 [2021-06-05 05:13:53,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 799.2ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:13:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-06-05 05:13:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 5066. [2021-06-05 05:13:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 5065 states have (on average 4.506416584402764) internal successors, (22825), 5065 states have internal predecessors, (22825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 22825 transitions. [2021-06-05 05:13:53,498 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 22825 transitions. Word has length 30 [2021-06-05 05:13:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:53,498 INFO L482 AbstractCegarLoop]: Abstraction has 5066 states and 22825 transitions. [2021-06-05 05:13:53,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 22825 transitions. [2021-06-05 05:13:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:53,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:53,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:53,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 05:13:53,707 INFO L430 AbstractCegarLoop]: === Iteration 185 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1184043260, now seen corresponding path program 10 times [2021-06-05 05:13:53,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:53,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928986406] [2021-06-05 05:13:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:53,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928986406] [2021-06-05 05:13:53,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928986406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433691362] [2021-06-05 05:13:53,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:53,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:53,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:53,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:54,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:54,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:54,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:13:54,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:54,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:54,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:54,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 05:13:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:54,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433691362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:54,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:54,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:13:54,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277818740] [2021-06-05 05:13:54,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:54,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:54,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:54,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:54,246 INFO L87 Difference]: Start difference. First operand 5066 states and 22825 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:55,423 INFO L93 Difference]: Finished difference Result 5908 states and 26143 transitions. [2021-06-05 05:13:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:13:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:55,436 INFO L225 Difference]: With dead ends: 5908 [2021-06-05 05:13:55,437 INFO L226 Difference]: Without dead ends: 5844 [2021-06-05 05:13:55,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 809.0ms TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:13:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5844 states. [2021-06-05 05:13:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5844 to 5073. [2021-06-05 05:13:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 5072 states have (on average 4.504929022082019) internal successors, (22849), 5072 states have internal predecessors, (22849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 22849 transitions. [2021-06-05 05:13:55,531 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 22849 transitions. Word has length 30 [2021-06-05 05:13:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:55,531 INFO L482 AbstractCegarLoop]: Abstraction has 5073 states and 22849 transitions. [2021-06-05 05:13:55,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 22849 transitions. [2021-06-05 05:13:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:55,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:55,540 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:55,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-05 05:13:55,740 INFO L430 AbstractCegarLoop]: === Iteration 186 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1181268604, now seen corresponding path program 11 times [2021-06-05 05:13:55,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:55,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705281811] [2021-06-05 05:13:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:55,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:55,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705281811] [2021-06-05 05:13:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705281811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:55,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598106012] [2021-06-05 05:13:55,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:56,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:56,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:56,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:56,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:56,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:56,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:13:56,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:56,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:56,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:56,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 05:13:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:56,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598106012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:56,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:56,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:13:56,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838374233] [2021-06-05 05:13:56,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:56,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:56,321 INFO L87 Difference]: Start difference. First operand 5073 states and 22849 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:57,374 INFO L93 Difference]: Finished difference Result 6053 states and 26758 transitions. [2021-06-05 05:13:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:13:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:13:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:57,388 INFO L225 Difference]: With dead ends: 6053 [2021-06-05 05:13:57,388 INFO L226 Difference]: Without dead ends: 5958 [2021-06-05 05:13:57,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 878.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:13:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2021-06-05 05:13:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5076. [2021-06-05 05:13:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 5075 states have (on average 4.504827586206897) internal successors, (22862), 5075 states have internal predecessors, (22862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 22862 transitions. [2021-06-05 05:13:57,483 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 22862 transitions. Word has length 30 [2021-06-05 05:13:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:57,483 INFO L482 AbstractCegarLoop]: Abstraction has 5076 states and 22862 transitions. [2021-06-05 05:13:57,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 22862 transitions. [2021-06-05 05:13:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:57,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:57,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:57,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 05:13:57,693 INFO L430 AbstractCegarLoop]: === Iteration 187 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1687614870, now seen corresponding path program 12 times [2021-06-05 05:13:57,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:57,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934889667] [2021-06-05 05:13:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:57,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:57,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934889667] [2021-06-05 05:13:57,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934889667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:57,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649906670] [2021-06-05 05:13:57,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:57,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:13:57,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:57,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:57,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:58,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:58,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:58,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 05:13:58,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:58,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:58,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:58,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:53 [2021-06-05 05:13:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:58,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649906670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:58,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:58,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:13:58,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667130126] [2021-06-05 05:13:58,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:58,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:58,267 INFO L87 Difference]: Start difference. First operand 5076 states and 22862 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:00,235 INFO L93 Difference]: Finished difference Result 5808 states and 25580 transitions. [2021-06-05 05:14:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:14:00,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:00,247 INFO L225 Difference]: With dead ends: 5808 [2021-06-05 05:14:00,247 INFO L226 Difference]: Without dead ends: 5676 [2021-06-05 05:14:00,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1501.5ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:14:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-05 05:14:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 5067. [2021-06-05 05:14:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 4.506514015001974) internal successors, (22830), 5066 states have internal predecessors, (22830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 22830 transitions. [2021-06-05 05:14:00,336 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 22830 transitions. Word has length 30 [2021-06-05 05:14:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:00,336 INFO L482 AbstractCegarLoop]: Abstraction has 5067 states and 22830 transitions. [2021-06-05 05:14:00,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 22830 transitions. [2021-06-05 05:14:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:00,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:00,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:00,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 05:14:00,546 INFO L430 AbstractCegarLoop]: === Iteration 188 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:00,546 INFO L82 PathProgramCache]: Analyzing trace with hash -945719780, now seen corresponding path program 13 times [2021-06-05 05:14:00,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:00,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822573412] [2021-06-05 05:14:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:00,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:00,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822573412] [2021-06-05 05:14:00,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822573412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:00,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908457485] [2021-06-05 05:14:00,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:00,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:00,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:00,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:00,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:00,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:00,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:00,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:00,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908457485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:00,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:00,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:14:00,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989019243] [2021-06-05 05:14:00,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:14:00,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:00,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:14:00,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:14:00,848 INFO L87 Difference]: Start difference. First operand 5067 states and 22830 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:02,191 INFO L93 Difference]: Finished difference Result 6269 states and 27713 transitions. [2021-06-05 05:14:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:14:02,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:02,204 INFO L225 Difference]: With dead ends: 6269 [2021-06-05 05:14:02,204 INFO L226 Difference]: Without dead ends: 6196 [2021-06-05 05:14:02,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 957.2ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:14:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-06-05 05:14:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5088. [2021-06-05 05:14:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 4.50560251621781) internal successors, (22920), 5087 states have internal predecessors, (22920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 22920 transitions. [2021-06-05 05:14:02,289 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 22920 transitions. Word has length 30 [2021-06-05 05:14:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:02,289 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 22920 transitions. [2021-06-05 05:14:02,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 22920 transitions. [2021-06-05 05:14:02,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:02,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:02,298 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:02,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:02,498 INFO L430 AbstractCegarLoop]: === Iteration 189 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash 580351298, now seen corresponding path program 14 times [2021-06-05 05:14:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:02,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974493588] [2021-06-05 05:14:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:02,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:02,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974493588] [2021-06-05 05:14:02,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974493588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:02,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300377658] [2021-06-05 05:14:02,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:02,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:02,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:02,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:02,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:02,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:02,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:02,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:02,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:02,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:02,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300377658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:02,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:02,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:14:02,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390804200] [2021-06-05 05:14:02,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:14:02,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:02,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:14:02,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:14:02,822 INFO L87 Difference]: Start difference. First operand 5088 states and 22920 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:04,018 INFO L93 Difference]: Finished difference Result 6262 states and 27736 transitions. [2021-06-05 05:14:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:14:04,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:04,033 INFO L225 Difference]: With dead ends: 6262 [2021-06-05 05:14:04,034 INFO L226 Difference]: Without dead ends: 6187 [2021-06-05 05:14:04,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 796.7ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:14:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2021-06-05 05:14:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 5079. [2021-06-05 05:14:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5079 states, 5078 states have (on average 4.50610476565577) internal successors, (22882), 5078 states have internal predecessors, (22882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5079 states to 5079 states and 22882 transitions. [2021-06-05 05:14:04,125 INFO L78 Accepts]: Start accepts. Automaton has 5079 states and 22882 transitions. Word has length 30 [2021-06-05 05:14:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:04,125 INFO L482 AbstractCegarLoop]: Abstraction has 5079 states and 22882 transitions. [2021-06-05 05:14:04,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 5079 states and 22882 transitions. [2021-06-05 05:14:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:04,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:04,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:04,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:04,335 INFO L430 AbstractCegarLoop]: === Iteration 190 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:04,335 INFO L82 PathProgramCache]: Analyzing trace with hash 343267964, now seen corresponding path program 1 times [2021-06-05 05:14:04,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:04,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134759372] [2021-06-05 05:14:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:04,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:04,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134759372] [2021-06-05 05:14:04,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134759372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:04,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711958747] [2021-06-05 05:14:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:04,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:04,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:04,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:04,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:04,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:04,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:04,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:04,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711958747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:04,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:04,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:14:04,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021536479] [2021-06-05 05:14:04,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:14:04,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:04,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:14:04,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:14:04,662 INFO L87 Difference]: Start difference. First operand 5079 states and 22882 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:05,837 INFO L93 Difference]: Finished difference Result 6489 states and 28602 transitions. [2021-06-05 05:14:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:14:05,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:05,852 INFO L225 Difference]: With dead ends: 6489 [2021-06-05 05:14:05,852 INFO L226 Difference]: Without dead ends: 6407 [2021-06-05 05:14:05,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 827.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:14:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2021-06-05 05:14:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 5089. [2021-06-05 05:14:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5089 states, 5088 states have (on average 4.505699685534591) internal successors, (22925), 5088 states have internal predecessors, (22925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5089 states to 5089 states and 22925 transitions. [2021-06-05 05:14:05,937 INFO L78 Accepts]: Start accepts. Automaton has 5089 states and 22925 transitions. Word has length 30 [2021-06-05 05:14:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:05,937 INFO L482 AbstractCegarLoop]: Abstraction has 5089 states and 22925 transitions. [2021-06-05 05:14:05,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5089 states and 22925 transitions. [2021-06-05 05:14:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:05,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:05,946 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:06,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:06,146 INFO L430 AbstractCegarLoop]: === Iteration 191 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash 963752030, now seen corresponding path program 2 times [2021-06-05 05:14:06,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:06,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859516555] [2021-06-05 05:14:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:06,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859516555] [2021-06-05 05:14:06,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859516555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026091770] [2021-06-05 05:14:06,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:06,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:06,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:06,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:06,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:06,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:14:06,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:06,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:06,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:06,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:14:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026091770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:06,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:06,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:14:06,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112640831] [2021-06-05 05:14:06,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:06,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:06,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:06,591 INFO L87 Difference]: Start difference. First operand 5089 states and 22925 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:08,250 INFO L93 Difference]: Finished difference Result 6703 states and 29403 transitions. [2021-06-05 05:14:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:14:08,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:08,264 INFO L225 Difference]: With dead ends: 6703 [2021-06-05 05:14:08,264 INFO L226 Difference]: Without dead ends: 6564 [2021-06-05 05:14:08,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1174.1ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:14:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2021-06-05 05:14:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 5081. [2021-06-05 05:14:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5081 states, 5080 states have (on average 4.506496062992126) internal successors, (22893), 5080 states have internal predecessors, (22893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5081 states to 5081 states and 22893 transitions. [2021-06-05 05:14:08,350 INFO L78 Accepts]: Start accepts. Automaton has 5081 states and 22893 transitions. Word has length 30 [2021-06-05 05:14:08,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:08,350 INFO L482 AbstractCegarLoop]: Abstraction has 5081 states and 22893 transitions. [2021-06-05 05:14:08,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5081 states and 22893 transitions. [2021-06-05 05:14:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:08,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:08,358 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:08,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:08,560 INFO L430 AbstractCegarLoop]: === Iteration 192 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:08,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1835829920, now seen corresponding path program 15 times [2021-06-05 05:14:08,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:08,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183907208] [2021-06-05 05:14:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:08,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:08,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183907208] [2021-06-05 05:14:08,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183907208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:08,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736851074] [2021-06-05 05:14:08,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:08,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:08,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:08,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:08,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:08,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:08,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:14:08,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:08,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:08,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:08,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:14:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:08,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736851074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:08,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:08,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:14:08,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951348129] [2021-06-05 05:14:08,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:08,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:08,919 INFO L87 Difference]: Start difference. First operand 5081 states and 22893 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:10,821 INFO L93 Difference]: Finished difference Result 6749 states and 29410 transitions. [2021-06-05 05:14:10,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:14:10,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:10,835 INFO L225 Difference]: With dead ends: 6749 [2021-06-05 05:14:10,835 INFO L226 Difference]: Without dead ends: 6510 [2021-06-05 05:14:10,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1369.5ms TimeCoverageRelationStatistics Valid=456, Invalid=2514, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:14:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2021-06-05 05:14:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 5094. [2021-06-05 05:14:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 4.505792263891616) internal successors, (22948), 5093 states have internal predecessors, (22948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 22948 transitions. [2021-06-05 05:14:10,922 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 22948 transitions. Word has length 30 [2021-06-05 05:14:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:10,922 INFO L482 AbstractCegarLoop]: Abstraction has 5094 states and 22948 transitions. [2021-06-05 05:14:10,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 22948 transitions. [2021-06-05 05:14:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:10,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:10,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:11,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 05:14:11,137 INFO L430 AbstractCegarLoop]: === Iteration 193 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:11,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:11,137 INFO L82 PathProgramCache]: Analyzing trace with hash -970174468, now seen corresponding path program 3 times [2021-06-05 05:14:11,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:11,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438476972] [2021-06-05 05:14:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:11,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:11,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438476972] [2021-06-05 05:14:11,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438476972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:11,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581569360] [2021-06-05 05:14:11,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:11,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:11,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:11,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:11,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:11,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:14:11,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:11,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:11,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:11,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:14:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:11,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581569360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:11,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:11,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:14:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892159431] [2021-06-05 05:14:11,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:11,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:11,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:11,565 INFO L87 Difference]: Start difference. First operand 5094 states and 22948 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:13,654 INFO L93 Difference]: Finished difference Result 7021 states and 30443 transitions. [2021-06-05 05:14:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:14:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:13,669 INFO L225 Difference]: With dead ends: 7021 [2021-06-05 05:14:13,669 INFO L226 Difference]: Without dead ends: 6790 [2021-06-05 05:14:13,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1540.8ms TimeCoverageRelationStatistics Valid=511, Invalid=2681, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:14:13,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6790 states. [2021-06-05 05:14:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6790 to 5085. [2021-06-05 05:14:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.507277734067663) internal successors, (22915), 5084 states have internal predecessors, (22915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 22915 transitions. [2021-06-05 05:14:13,755 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 22915 transitions. Word has length 30 [2021-06-05 05:14:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:13,755 INFO L482 AbstractCegarLoop]: Abstraction has 5085 states and 22915 transitions. [2021-06-05 05:14:13,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 22915 transitions. [2021-06-05 05:14:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:13,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:13,764 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:13,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 05:14:13,964 INFO L430 AbstractCegarLoop]: === Iteration 194 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash -686924456, now seen corresponding path program 16 times [2021-06-05 05:14:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:13,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664331897] [2021-06-05 05:14:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:14,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:14,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664331897] [2021-06-05 05:14:14,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664331897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:14,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371921447] [2021-06-05 05:14:14,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:14,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:14,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:14,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:14,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:14,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:14,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:14,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:14,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:14,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:14:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:14,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371921447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:14,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:14,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:14:14,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869521664] [2021-06-05 05:14:14,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:14:14,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:14,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:14:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:14:14,283 INFO L87 Difference]: Start difference. First operand 5085 states and 22915 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:15,333 INFO L93 Difference]: Finished difference Result 6255 states and 27671 transitions. [2021-06-05 05:14:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:14:15,334 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:15,347 INFO L225 Difference]: With dead ends: 6255 [2021-06-05 05:14:15,347 INFO L226 Difference]: Without dead ends: 6182 [2021-06-05 05:14:15,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 766.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:14:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6182 states. [2021-06-05 05:14:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6182 to 5097. [2021-06-05 05:14:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5097 states, 5096 states have (on average 4.506671899529042) internal successors, (22966), 5096 states have internal predecessors, (22966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5097 states to 5097 states and 22966 transitions. [2021-06-05 05:14:15,432 INFO L78 Accepts]: Start accepts. Automaton has 5097 states and 22966 transitions. Word has length 30 [2021-06-05 05:14:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:15,432 INFO L482 AbstractCegarLoop]: Abstraction has 5097 states and 22966 transitions. [2021-06-05 05:14:15,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 5097 states and 22966 transitions. [2021-06-05 05:14:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:15,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:15,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:15,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 05:14:15,641 INFO L430 AbstractCegarLoop]: === Iteration 195 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash 839146622, now seen corresponding path program 17 times [2021-06-05 05:14:15,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:15,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055884373] [2021-06-05 05:14:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:15,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:15,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055884373] [2021-06-05 05:14:15,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055884373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:15,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834245628] [2021-06-05 05:14:15,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:15,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:15,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:15,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:15,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:15,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:15,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:14:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:15,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834245628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:15,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:15,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:14:15,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088125131] [2021-06-05 05:14:15,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:14:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:14:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:14:15,927 INFO L87 Difference]: Start difference. First operand 5097 states and 22966 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:16,899 INFO L93 Difference]: Finished difference Result 6270 states and 27778 transitions. [2021-06-05 05:14:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:14:16,899 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:16,913 INFO L225 Difference]: With dead ends: 6270 [2021-06-05 05:14:16,913 INFO L226 Difference]: Without dead ends: 6195 [2021-06-05 05:14:16,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 669.1ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:14:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6195 states. [2021-06-05 05:14:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6195 to 5088. [2021-06-05 05:14:17,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 4.5071751523491255) internal successors, (22928), 5087 states have internal predecessors, (22928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 22928 transitions. [2021-06-05 05:14:17,034 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 22928 transitions. Word has length 30 [2021-06-05 05:14:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:17,034 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 22928 transitions. [2021-06-05 05:14:17,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 22928 transitions. [2021-06-05 05:14:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:17,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:17,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:17,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:17,243 INFO L430 AbstractCegarLoop]: === Iteration 196 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:17,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1057439550, now seen corresponding path program 18 times [2021-06-05 05:14:17,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:17,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277331744] [2021-06-05 05:14:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:17,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:17,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277331744] [2021-06-05 05:14:17,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277331744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:17,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807799346] [2021-06-05 05:14:17,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:17,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:17,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:14:17,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:17,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:17,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:17,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:17,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 05:14:17,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:17,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:17,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:17,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:91 [2021-06-05 05:14:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:17,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807799346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:17,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:17,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:14:17,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467481333] [2021-06-05 05:14:17,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:17,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:17,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:17,675 INFO L87 Difference]: Start difference. First operand 5088 states and 22928 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:19,466 INFO L93 Difference]: Finished difference Result 6315 states and 27840 transitions. [2021-06-05 05:14:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:14:19,466 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:19,480 INFO L225 Difference]: With dead ends: 6315 [2021-06-05 05:14:19,480 INFO L226 Difference]: Without dead ends: 6226 [2021-06-05 05:14:19,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1347.7ms TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:14:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6226 states. [2021-06-05 05:14:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6226 to 5100. [2021-06-05 05:14:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5100 states, 5099 states have (on average 4.506177681898412) internal successors, (22977), 5099 states have internal predecessors, (22977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 22977 transitions. [2021-06-05 05:14:19,566 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 22977 transitions. Word has length 30 [2021-06-05 05:14:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:19,566 INFO L482 AbstractCegarLoop]: Abstraction has 5100 states and 22977 transitions. [2021-06-05 05:14:19,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 22977 transitions. [2021-06-05 05:14:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:19,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:19,574 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:19,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:19,775 INFO L430 AbstractCegarLoop]: === Iteration 197 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:19,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1982402336, now seen corresponding path program 19 times [2021-06-05 05:14:19,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:19,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612383384] [2021-06-05 05:14:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:19,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:19,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612383384] [2021-06-05 05:14:19,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612383384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:19,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310675340] [2021-06-05 05:14:19,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:19,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:19,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:20,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:20,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:20,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:20,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:20,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:14:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:20,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310675340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:20,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:20,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:20,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762070163] [2021-06-05 05:14:20,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:20,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:20,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:20,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:20,149 INFO L87 Difference]: Start difference. First operand 5100 states and 22977 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:21,300 INFO L93 Difference]: Finished difference Result 6309 states and 27873 transitions. [2021-06-05 05:14:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:14:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:21,313 INFO L225 Difference]: With dead ends: 6309 [2021-06-05 05:14:21,313 INFO L226 Difference]: Without dead ends: 6250 [2021-06-05 05:14:21,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 854.6ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:14:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2021-06-05 05:14:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 5094. [2021-06-05 05:14:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 4.506577655605733) internal successors, (22952), 5093 states have internal predecessors, (22952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 22952 transitions. [2021-06-05 05:14:21,396 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 22952 transitions. Word has length 30 [2021-06-05 05:14:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:21,396 INFO L482 AbstractCegarLoop]: Abstraction has 5094 states and 22952 transitions. [2021-06-05 05:14:21,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 22952 transitions. [2021-06-05 05:14:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:21,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:21,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:21,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 05:14:21,605 INFO L430 AbstractCegarLoop]: === Iteration 198 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1677923616, now seen corresponding path program 20 times [2021-06-05 05:14:21,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:21,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018013029] [2021-06-05 05:14:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:21,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:21,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018013029] [2021-06-05 05:14:21,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018013029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:21,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824091637] [2021-06-05 05:14:21,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:21,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:21,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:21,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:21,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:21,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:14:21,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:21,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:21,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:21,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:14:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:21,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824091637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:21,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:21,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:14:21,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060967341] [2021-06-05 05:14:21,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:21,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:21,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:21,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:21,996 INFO L87 Difference]: Start difference. First operand 5094 states and 22952 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:23,477 INFO L93 Difference]: Finished difference Result 6474 states and 28453 transitions. [2021-06-05 05:14:23,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:14:23,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:23,491 INFO L225 Difference]: With dead ends: 6474 [2021-06-05 05:14:23,491 INFO L226 Difference]: Without dead ends: 6351 [2021-06-05 05:14:23,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 999.5ms TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:14:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-06-05 05:14:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 5088. [2021-06-05 05:14:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 4.5071751523491255) internal successors, (22928), 5087 states have internal predecessors, (22928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 22928 transitions. [2021-06-05 05:14:23,576 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 22928 transitions. Word has length 30 [2021-06-05 05:14:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:23,576 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 22928 transitions. [2021-06-05 05:14:23,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 22928 transitions. [2021-06-05 05:14:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:23,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:23,585 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:23,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:23,785 INFO L430 AbstractCegarLoop]: === Iteration 199 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1845781024, now seen corresponding path program 21 times [2021-06-05 05:14:23,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:23,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849886390] [2021-06-05 05:14:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:23,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849886390] [2021-06-05 05:14:23,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849886390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445925834] [2021-06-05 05:14:23,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:23,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:24,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:24,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:14:24,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:24,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:24,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:24,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:14:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:24,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445925834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:24,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:24,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:14:24,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747598206] [2021-06-05 05:14:24,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:24,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:24,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:24,197 INFO L87 Difference]: Start difference. First operand 5088 states and 22928 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:25,661 INFO L93 Difference]: Finished difference Result 6454 states and 28376 transitions. [2021-06-05 05:14:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:14:25,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:25,675 INFO L225 Difference]: With dead ends: 6454 [2021-06-05 05:14:25,675 INFO L226 Difference]: Without dead ends: 6312 [2021-06-05 05:14:25,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1093.1ms TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:14:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-06-05 05:14:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 5088. [2021-06-05 05:14:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 4.5071751523491255) internal successors, (22928), 5087 states have internal predecessors, (22928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 22928 transitions. [2021-06-05 05:14:25,763 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 22928 transitions. Word has length 30 [2021-06-05 05:14:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:25,763 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 22928 transitions. [2021-06-05 05:14:25,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 22928 transitions. [2021-06-05 05:14:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:25,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:25,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:25,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 05:14:25,972 INFO L430 AbstractCegarLoop]: === Iteration 200 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:25,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1812719418, now seen corresponding path program 22 times [2021-06-05 05:14:25,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:25,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808331936] [2021-06-05 05:14:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:26,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:26,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808331936] [2021-06-05 05:14:26,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808331936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:26,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912256340] [2021-06-05 05:14:26,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:26,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:26,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:26,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:26,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:26,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:26,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:26,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:26,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:26,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:14:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:26,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912256340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:26,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:26,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:26,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757686978] [2021-06-05 05:14:26,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:26,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:26,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:26,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:26,301 INFO L87 Difference]: Start difference. First operand 5088 states and 22928 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:27,229 INFO L93 Difference]: Finished difference Result 6446 states and 28454 transitions. [2021-06-05 05:14:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:14:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:27,243 INFO L225 Difference]: With dead ends: 6446 [2021-06-05 05:14:27,243 INFO L226 Difference]: Without dead ends: 6382 [2021-06-05 05:14:27,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 638.7ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:14:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6382 states. [2021-06-05 05:14:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6382 to 5085. [2021-06-05 05:14:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.507277734067663) internal successors, (22915), 5084 states have internal predecessors, (22915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 22915 transitions. [2021-06-05 05:14:27,329 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 22915 transitions. Word has length 30 [2021-06-05 05:14:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:27,329 INFO L482 AbstractCegarLoop]: Abstraction has 5085 states and 22915 transitions. [2021-06-05 05:14:27,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 22915 transitions. [2021-06-05 05:14:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:27,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:27,380 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:27,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:27,581 INFO L430 AbstractCegarLoop]: === Iteration 201 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2042348638, now seen corresponding path program 23 times [2021-06-05 05:14:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:27,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005192960] [2021-06-05 05:14:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:27,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:27,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005192960] [2021-06-05 05:14:27,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005192960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:27,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988458496] [2021-06-05 05:14:27,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:27,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:27,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:27,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:27,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:27,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:27,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:27,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:14:27,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:27,934 INFO L628 ElimStorePlain]: treesize reduction 55, result has 28.6 percent of original size [2021-06-05 05:14:27,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:27,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 05:14:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:28,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988458496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:28,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:28,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:14:28,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551134987] [2021-06-05 05:14:28,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:28,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:28,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:28,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:28,023 INFO L87 Difference]: Start difference. First operand 5085 states and 22915 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:29,990 INFO L93 Difference]: Finished difference Result 6719 states and 29351 transitions. [2021-06-05 05:14:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:14:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:30,005 INFO L225 Difference]: With dead ends: 6719 [2021-06-05 05:14:30,005 INFO L226 Difference]: Without dead ends: 6480 [2021-06-05 05:14:30,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1352.3ms TimeCoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:14:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-06-05 05:14:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5122. [2021-06-05 05:14:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5122 states, 5121 states have (on average 4.504588947471197) internal successors, (23068), 5121 states have internal predecessors, (23068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:30,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5122 states to 5122 states and 23068 transitions. [2021-06-05 05:14:30,104 INFO L78 Accepts]: Start accepts. Automaton has 5122 states and 23068 transitions. Word has length 30 [2021-06-05 05:14:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:30,104 INFO L482 AbstractCegarLoop]: Abstraction has 5122 states and 23068 transitions. [2021-06-05 05:14:30,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:30,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5122 states and 23068 transitions. [2021-06-05 05:14:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:30,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:30,113 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:30,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:30,313 INFO L430 AbstractCegarLoop]: === Iteration 202 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1176693186, now seen corresponding path program 4 times [2021-06-05 05:14:30,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:30,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678047591] [2021-06-05 05:14:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:30,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:30,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678047591] [2021-06-05 05:14:30,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678047591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:30,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11795312] [2021-06-05 05:14:30,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:30,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:30,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:30,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:30,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:30,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:30,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:30,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:30,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:30,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:14:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:30,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11795312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:30,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:30,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:30,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128356256] [2021-06-05 05:14:30,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:30,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:30,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:30,732 INFO L87 Difference]: Start difference. First operand 5122 states and 23068 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:32,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:32,048 INFO L93 Difference]: Finished difference Result 6920 states and 30296 transitions. [2021-06-05 05:14:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:14:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:32,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:32,061 INFO L225 Difference]: With dead ends: 6920 [2021-06-05 05:14:32,062 INFO L226 Difference]: Without dead ends: 6768 [2021-06-05 05:14:32,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 916.8ms TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:14:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2021-06-05 05:14:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 5109. [2021-06-05 05:14:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5109 states, 5108 states have (on average 4.505285826155051) internal successors, (23013), 5108 states have internal predecessors, (23013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5109 states to 5109 states and 23013 transitions. [2021-06-05 05:14:32,148 INFO L78 Accepts]: Start accepts. Automaton has 5109 states and 23013 transitions. Word has length 30 [2021-06-05 05:14:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:32,148 INFO L482 AbstractCegarLoop]: Abstraction has 5109 states and 23013 transitions. [2021-06-05 05:14:32,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 5109 states and 23013 transitions. [2021-06-05 05:14:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:32,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:32,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:32,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 05:14:32,357 INFO L430 AbstractCegarLoop]: === Iteration 203 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:32,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1983872230, now seen corresponding path program 24 times [2021-06-05 05:14:32,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:32,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915973699] [2021-06-05 05:14:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:32,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915973699] [2021-06-05 05:14:32,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915973699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341616366] [2021-06-05 05:14:32,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:32,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:32,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:14:32,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:32,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:32,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-06-05 05:14:32,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:32,728 INFO L628 ElimStorePlain]: treesize reduction 29, result has 58.6 percent of original size [2021-06-05 05:14:32,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:32,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:42 [2021-06-05 05:14:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:32,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341616366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:32,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:32,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:14:32,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054056687] [2021-06-05 05:14:32,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:32,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:32,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:32,821 INFO L87 Difference]: Start difference. First operand 5109 states and 23013 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:34,501 INFO L93 Difference]: Finished difference Result 6523 states and 28640 transitions. [2021-06-05 05:14:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:14:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:34,517 INFO L225 Difference]: With dead ends: 6523 [2021-06-05 05:14:34,517 INFO L226 Difference]: Without dead ends: 6369 [2021-06-05 05:14:34,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1198.1ms TimeCoverageRelationStatistics Valid=461, Invalid=2295, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:14:34,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2021-06-05 05:14:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 5109. [2021-06-05 05:14:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5109 states, 5108 states have (on average 4.505285826155051) internal successors, (23013), 5108 states have internal predecessors, (23013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5109 states to 5109 states and 23013 transitions. [2021-06-05 05:14:34,660 INFO L78 Accepts]: Start accepts. Automaton has 5109 states and 23013 transitions. Word has length 30 [2021-06-05 05:14:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:34,661 INFO L482 AbstractCegarLoop]: Abstraction has 5109 states and 23013 transitions. [2021-06-05 05:14:34,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 5109 states and 23013 transitions. [2021-06-05 05:14:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:34,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:34,669 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:34,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 05:14:34,870 INFO L430 AbstractCegarLoop]: === Iteration 204 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1347405376, now seen corresponding path program 25 times [2021-06-05 05:14:34,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:34,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686601864] [2021-06-05 05:14:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:34,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:34,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686601864] [2021-06-05 05:14:34,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686601864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:34,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322770759] [2021-06-05 05:14:34,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:35,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:35,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:35,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:35,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:35,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:35,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:14:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:35,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322770759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:35,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:35,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:35,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686473316] [2021-06-05 05:14:35,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:35,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:35,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:35,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:35,222 INFO L87 Difference]: Start difference. First operand 5109 states and 23013 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:36,532 INFO L93 Difference]: Finished difference Result 6580 states and 29015 transitions. [2021-06-05 05:14:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:14:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:36,546 INFO L225 Difference]: With dead ends: 6580 [2021-06-05 05:14:36,546 INFO L226 Difference]: Without dead ends: 6500 [2021-06-05 05:14:36,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 868.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1590, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:14:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6500 states. [2021-06-05 05:14:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6500 to 5089. [2021-06-05 05:14:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5089 states, 5088 states have (on average 4.508058176100629) internal successors, (22937), 5088 states have internal predecessors, (22937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5089 states to 5089 states and 22937 transitions. [2021-06-05 05:14:36,635 INFO L78 Accepts]: Start accepts. Automaton has 5089 states and 22937 transitions. Word has length 30 [2021-06-05 05:14:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:36,636 INFO L482 AbstractCegarLoop]: Abstraction has 5089 states and 22937 transitions. [2021-06-05 05:14:36,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 5089 states and 22937 transitions. [2021-06-05 05:14:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:36,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:36,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:36,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:36,849 INFO L430 AbstractCegarLoop]: === Iteration 205 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash 705435170, now seen corresponding path program 4 times [2021-06-05 05:14:36,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:36,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256918818] [2021-06-05 05:14:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:36,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:36,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256918818] [2021-06-05 05:14:36,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256918818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:36,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766849285] [2021-06-05 05:14:36,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:36,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:36,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:37,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:37,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:37,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:37,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:14:37,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:37,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:37,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:37,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 05:14:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:37,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766849285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:37,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:37,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:14:37,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517471959] [2021-06-05 05:14:37,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:14:37,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:37,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:14:37,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:14:37,194 INFO L87 Difference]: Start difference. First operand 5089 states and 22937 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:37,831 INFO L93 Difference]: Finished difference Result 5843 states and 25905 transitions. [2021-06-05 05:14:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:14:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:37,844 INFO L225 Difference]: With dead ends: 5843 [2021-06-05 05:14:37,844 INFO L226 Difference]: Without dead ends: 5772 [2021-06-05 05:14:37,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2021-06-05 05:14:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 5121. [2021-06-05 05:14:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5121 states, 5120 states have (on average 4.5048828125) internal successors, (23065), 5120 states have internal predecessors, (23065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5121 states to 5121 states and 23065 transitions. [2021-06-05 05:14:37,938 INFO L78 Accepts]: Start accepts. Automaton has 5121 states and 23065 transitions. Word has length 30 [2021-06-05 05:14:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:37,938 INFO L482 AbstractCegarLoop]: Abstraction has 5121 states and 23065 transitions. [2021-06-05 05:14:37,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5121 states and 23065 transitions. [2021-06-05 05:14:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:37,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:37,947 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:38,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:38,147 INFO L430 AbstractCegarLoop]: === Iteration 206 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:38,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1571090622, now seen corresponding path program 26 times [2021-06-05 05:14:38,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:38,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908574191] [2021-06-05 05:14:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:38,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:38,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908574191] [2021-06-05 05:14:38,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908574191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:38,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547812345] [2021-06-05 05:14:38,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:38,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:38,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:38,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:38,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:38,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:38,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:38,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:38,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:38,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 05:14:38,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:38,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:38,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:38,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-06-05 05:14:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:38,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547812345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:38,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:38,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:14:38,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996499355] [2021-06-05 05:14:38,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:38,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:38,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:38,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:38,762 INFO L87 Difference]: Start difference. First operand 5121 states and 23065 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:40,728 INFO L93 Difference]: Finished difference Result 6111 states and 26760 transitions. [2021-06-05 05:14:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:14:40,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:40,740 INFO L225 Difference]: With dead ends: 6111 [2021-06-05 05:14:40,741 INFO L226 Difference]: Without dead ends: 5979 [2021-06-05 05:14:40,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1334.9ms TimeCoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:14:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2021-06-05 05:14:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5135. [2021-06-05 05:14:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5135 states, 5134 states have (on average 4.501947798987144) internal successors, (23113), 5134 states have internal predecessors, (23113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5135 states to 5135 states and 23113 transitions. [2021-06-05 05:14:40,823 INFO L78 Accepts]: Start accepts. Automaton has 5135 states and 23113 transitions. Word has length 30 [2021-06-05 05:14:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:40,823 INFO L482 AbstractCegarLoop]: Abstraction has 5135 states and 23113 transitions. [2021-06-05 05:14:40,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5135 states and 23113 transitions. [2021-06-05 05:14:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:40,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:40,831 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:41,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable395 [2021-06-05 05:14:41,032 INFO L430 AbstractCegarLoop]: === Iteration 207 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:41,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1573865278, now seen corresponding path program 27 times [2021-06-05 05:14:41,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:41,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325866306] [2021-06-05 05:14:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:41,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:41,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325866306] [2021-06-05 05:14:41,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325866306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:41,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115965349] [2021-06-05 05:14:41,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:41,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:14:41,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:41,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:41,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:41,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:41,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 05:14:41,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:41,513 INFO L628 ElimStorePlain]: treesize reduction 33, result has 54.2 percent of original size [2021-06-05 05:14:41,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:41,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:53 [2021-06-05 05:14:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:41,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115965349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:41,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:41,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:14:41,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623477997] [2021-06-05 05:14:41,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:41,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:41,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:41,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:41,645 INFO L87 Difference]: Start difference. First operand 5135 states and 23113 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:43,507 INFO L93 Difference]: Finished difference Result 6129 states and 26870 transitions. [2021-06-05 05:14:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:14:43,508 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:43,521 INFO L225 Difference]: With dead ends: 6129 [2021-06-05 05:14:43,522 INFO L226 Difference]: Without dead ends: 5971 [2021-06-05 05:14:43,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1395.3ms TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:14:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-06-05 05:14:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5169. [2021-06-05 05:14:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5169 states, 5168 states have (on average 4.4963235294117645) internal successors, (23237), 5168 states have internal predecessors, (23237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5169 states to 5169 states and 23237 transitions. [2021-06-05 05:14:43,618 INFO L78 Accepts]: Start accepts. Automaton has 5169 states and 23237 transitions. Word has length 30 [2021-06-05 05:14:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:43,618 INFO L482 AbstractCegarLoop]: Abstraction has 5169 states and 23237 transitions. [2021-06-05 05:14:43,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 5169 states and 23237 transitions. [2021-06-05 05:14:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:43,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:43,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:43,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 05:14:43,828 INFO L430 AbstractCegarLoop]: === Iteration 208 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:43,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1067519012, now seen corresponding path program 28 times [2021-06-05 05:14:43,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:43,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725948372] [2021-06-05 05:14:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:44,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:44,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725948372] [2021-06-05 05:14:44,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725948372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:44,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440925994] [2021-06-05 05:14:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:44,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:44,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:44,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:44,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:44,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:44,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:14:44,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:44,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:44,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:44,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 05:14:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:44,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440925994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:44,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:44,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:14:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515937988] [2021-06-05 05:14:44,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:44,373 INFO L87 Difference]: Start difference. First operand 5169 states and 23237 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:45,226 INFO L93 Difference]: Finished difference Result 6093 states and 26871 transitions. [2021-06-05 05:14:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:14:45,227 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:45,239 INFO L225 Difference]: With dead ends: 6093 [2021-06-05 05:14:45,239 INFO L226 Difference]: Without dead ends: 6029 [2021-06-05 05:14:45,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 644.7ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:14:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2021-06-05 05:14:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 5162. [2021-06-05 05:14:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 5161 states have (on average 4.497771749660918) internal successors, (23213), 5161 states have internal predecessors, (23213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 23213 transitions. [2021-06-05 05:14:45,325 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 23213 transitions. Word has length 30 [2021-06-05 05:14:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:45,325 INFO L482 AbstractCegarLoop]: Abstraction has 5162 states and 23213 transitions. [2021-06-05 05:14:45,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 23213 transitions. [2021-06-05 05:14:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:45,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:45,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:45,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:45,534 INFO L430 AbstractCegarLoop]: === Iteration 209 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:45,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1348670500, now seen corresponding path program 29 times [2021-06-05 05:14:45,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:45,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964935928] [2021-06-05 05:14:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:45,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:45,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964935928] [2021-06-05 05:14:45,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964935928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:45,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616660343] [2021-06-05 05:14:45,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:45,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:45,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:45,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:45,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:45,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:45,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 45 [2021-06-05 05:14:45,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 05:14:45,965 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.8 percent of original size [2021-06-05 05:14:45,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:45,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-05 05:14:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:46,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616660343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:46,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:46,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:14:46,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939757826] [2021-06-05 05:14:46,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:46,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:46,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:46,035 INFO L87 Difference]: Start difference. First operand 5162 states and 23213 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:47,180 INFO L93 Difference]: Finished difference Result 6788 states and 29674 transitions. [2021-06-05 05:14:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:14:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:47,195 INFO L225 Difference]: With dead ends: 6788 [2021-06-05 05:14:47,195 INFO L226 Difference]: Without dead ends: 6561 [2021-06-05 05:14:47,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:14:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2021-06-05 05:14:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 5186. [2021-06-05 05:14:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5186 states, 5185 states have (on average 4.494310511089682) internal successors, (23303), 5185 states have internal predecessors, (23303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 23303 transitions. [2021-06-05 05:14:47,288 INFO L78 Accepts]: Start accepts. Automaton has 5186 states and 23303 transitions. Word has length 30 [2021-06-05 05:14:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:47,288 INFO L482 AbstractCegarLoop]: Abstraction has 5186 states and 23303 transitions. [2021-06-05 05:14:47,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5186 states and 23303 transitions. [2021-06-05 05:14:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:47,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:47,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:47,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2021-06-05 05:14:47,497 INFO L430 AbstractCegarLoop]: === Iteration 210 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:47,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:47,497 INFO L82 PathProgramCache]: Analyzing trace with hash 336756796, now seen corresponding path program 5 times [2021-06-05 05:14:47,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:47,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362932175] [2021-06-05 05:14:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:47,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:47,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362932175] [2021-06-05 05:14:47,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362932175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:47,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228072556] [2021-06-05 05:14:47,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:47,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:47,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:47,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:47,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:47,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:47,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:47,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:47,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:47,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:14:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:47,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228072556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:47,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:47,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:47,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113152440] [2021-06-05 05:14:47,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:47,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:47,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:47,879 INFO L87 Difference]: Start difference. First operand 5186 states and 23303 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:49,092 INFO L93 Difference]: Finished difference Result 6944 states and 30547 transitions. [2021-06-05 05:14:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:14:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:49,107 INFO L225 Difference]: With dead ends: 6944 [2021-06-05 05:14:49,107 INFO L226 Difference]: Without dead ends: 6873 [2021-06-05 05:14:49,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:14:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6873 states. [2021-06-05 05:14:49,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6873 to 5178. [2021-06-05 05:14:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 4.495460691520186) internal successors, (23273), 5177 states have internal predecessors, (23273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 23273 transitions. [2021-06-05 05:14:49,232 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 23273 transitions. Word has length 30 [2021-06-05 05:14:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:49,232 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 23273 transitions. [2021-06-05 05:14:49,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 23273 transitions. [2021-06-05 05:14:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:49,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:49,240 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:49,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:49,441 INFO L430 AbstractCegarLoop]: === Iteration 211 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1791569640, now seen corresponding path program 30 times [2021-06-05 05:14:49,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:49,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905410304] [2021-06-05 05:14:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:49,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:49,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905410304] [2021-06-05 05:14:49,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905410304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:49,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240882343] [2021-06-05 05:14:49,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:49,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:49,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:49,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:49,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:49,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:49,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:49,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:49,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:49,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:49,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-05 05:14:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:49,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240882343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:49,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:49,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:14:49,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111051803] [2021-06-05 05:14:49,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:49,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:49,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:49,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:49,865 INFO L87 Difference]: Start difference. First operand 5178 states and 23273 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:51,094 INFO L93 Difference]: Finished difference Result 6471 states and 28525 transitions. [2021-06-05 05:14:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:14:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:51,108 INFO L225 Difference]: With dead ends: 6471 [2021-06-05 05:14:51,108 INFO L226 Difference]: Without dead ends: 6400 [2021-06-05 05:14:51,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:14:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6400 states. [2021-06-05 05:14:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6400 to 5178. [2021-06-05 05:14:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 4.495460691520186) internal successors, (23273), 5177 states have internal predecessors, (23273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 23273 transitions. [2021-06-05 05:14:51,196 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 23273 transitions. Word has length 30 [2021-06-05 05:14:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:51,197 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 23273 transitions. [2021-06-05 05:14:51,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 23273 transitions. [2021-06-05 05:14:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:51,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:51,206 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:51,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 05:14:51,406 INFO L430 AbstractCegarLoop]: === Iteration 212 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1997051390, now seen corresponding path program 31 times [2021-06-05 05:14:51,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:51,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645838177] [2021-06-05 05:14:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:51,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:51,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645838177] [2021-06-05 05:14:51,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645838177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:51,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929473538] [2021-06-05 05:14:51,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:51,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:51,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:51,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:51,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:51,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:51,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:14:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:51,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929473538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:51,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:51,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:51,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195969442] [2021-06-05 05:14:51,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:51,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:51,824 INFO L87 Difference]: Start difference. First operand 5178 states and 23273 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:53,074 INFO L93 Difference]: Finished difference Result 6654 states and 29363 transitions. [2021-06-05 05:14:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:14:53,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:53,088 INFO L225 Difference]: With dead ends: 6654 [2021-06-05 05:14:53,088 INFO L226 Difference]: Without dead ends: 6590 [2021-06-05 05:14:53,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 855.1ms TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:14:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6590 states. [2021-06-05 05:14:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6590 to 5162. [2021-06-05 05:14:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 5161 states have (on average 4.497771749660918) internal successors, (23213), 5161 states have internal predecessors, (23213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 23213 transitions. [2021-06-05 05:14:53,185 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 23213 transitions. Word has length 30 [2021-06-05 05:14:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:53,185 INFO L482 AbstractCegarLoop]: Abstraction has 5162 states and 23213 transitions. [2021-06-05 05:14:53,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 23213 transitions. [2021-06-05 05:14:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:53,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:53,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:53,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:53,397 INFO L430 AbstractCegarLoop]: === Iteration 213 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1293295150, now seen corresponding path program 57 times [2021-06-05 05:14:53,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:53,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188069564] [2021-06-05 05:14:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:53,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188069564] [2021-06-05 05:14:53,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188069564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347466615] [2021-06-05 05:14:53,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:53,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:14:53,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:53,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:53,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:53,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:53,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:53,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 05:14:53,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:14:53,805 INFO L628 ElimStorePlain]: treesize reduction 10, result has 86.3 percent of original size [2021-06-05 05:14:53,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:53,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:102 [2021-06-05 05:14:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:53,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347466615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:53,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:53,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:14:53,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330060381] [2021-06-05 05:14:53,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:53,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:53,926 INFO L87 Difference]: Start difference. First operand 5162 states and 23213 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:56,099 INFO L93 Difference]: Finished difference Result 7528 states and 31735 transitions. [2021-06-05 05:14:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:14:56,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:56,115 INFO L225 Difference]: With dead ends: 7528 [2021-06-05 05:14:56,115 INFO L226 Difference]: Without dead ends: 7281 [2021-06-05 05:14:56,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1590.5ms TimeCoverageRelationStatistics Valid=375, Invalid=2705, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:14:56,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-06-05 05:14:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 5231. [2021-06-05 05:14:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 5230 states have (on average 4.495984703632887) internal successors, (23514), 5230 states have internal predecessors, (23514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 23514 transitions. [2021-06-05 05:14:56,268 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 23514 transitions. Word has length 30 [2021-06-05 05:14:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:56,268 INFO L482 AbstractCegarLoop]: Abstraction has 5231 states and 23514 transitions. [2021-06-05 05:14:56,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 23514 transitions. [2021-06-05 05:14:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:56,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:56,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:56,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 05:14:56,477 INFO L430 AbstractCegarLoop]: === Iteration 214 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2003594308, now seen corresponding path program 5 times [2021-06-05 05:14:56,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:56,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699436993] [2021-06-05 05:14:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:56,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:56,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699436993] [2021-06-05 05:14:56,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699436993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:56,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138945159] [2021-06-05 05:14:56,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:56,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:14:56,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:56,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:56,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:56,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:56,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:56,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:56,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 05:14:56,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:56,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:56,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:56,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 05:14:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:56,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138945159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:56,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:56,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:14:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917836226] [2021-06-05 05:14:56,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:14:56,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:56,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:14:56,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:14:56,846 INFO L87 Difference]: Start difference. First operand 5231 states and 23514 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:57,469 INFO L93 Difference]: Finished difference Result 6052 states and 26741 transitions. [2021-06-05 05:14:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:14:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:57,482 INFO L225 Difference]: With dead ends: 6052 [2021-06-05 05:14:57,483 INFO L226 Difference]: Without dead ends: 5862 [2021-06-05 05:14:57,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:57,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-06-05 05:14:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5272. [2021-06-05 05:14:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5272 states, 5271 states have (on average 4.48871181938911) internal successors, (23660), 5271 states have internal predecessors, (23660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5272 states to 5272 states and 23660 transitions. [2021-06-05 05:14:57,574 INFO L78 Accepts]: Start accepts. Automaton has 5272 states and 23660 transitions. Word has length 30 [2021-06-05 05:14:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:57,574 INFO L482 AbstractCegarLoop]: Abstraction has 5272 states and 23660 transitions. [2021-06-05 05:14:57,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5272 states and 23660 transitions. [2021-06-05 05:14:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:57,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:57,583 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:57,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:57,784 INFO L430 AbstractCegarLoop]: === Iteration 215 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2026530574, now seen corresponding path program 58 times [2021-06-05 05:14:57,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:57,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026983315] [2021-06-05 05:14:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:57,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:57,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026983315] [2021-06-05 05:14:57,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026983315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:57,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616463973] [2021-06-05 05:14:57,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:57,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:57,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:57,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:58,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:58,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:58,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:58,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:14:58,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:58,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:58,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:58,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:14:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:58,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616463973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:58,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:58,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:14:58,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97715000] [2021-06-05 05:14:58,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:14:58,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:58,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:14:58,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:14:58,155 INFO L87 Difference]: Start difference. First operand 5272 states and 23660 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:59,400 INFO L93 Difference]: Finished difference Result 6816 states and 29490 transitions. [2021-06-05 05:14:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:14:59,400 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:14:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:59,414 INFO L225 Difference]: With dead ends: 6816 [2021-06-05 05:14:59,414 INFO L226 Difference]: Without dead ends: 6656 [2021-06-05 05:14:59,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 787.7ms TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:14:59,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2021-06-05 05:14:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 5352. [2021-06-05 05:14:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 4.493178845075687) internal successors, (24043), 5351 states have internal predecessors, (24043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 24043 transitions. [2021-06-05 05:14:59,514 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 24043 transitions. Word has length 30 [2021-06-05 05:14:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:59,514 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 24043 transitions. [2021-06-05 05:14:59,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 24043 transitions. [2021-06-05 05:14:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:14:59,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:59,523 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:59,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:59,724 INFO L430 AbstractCegarLoop]: === Iteration 216 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:14:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:59,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1713004178, now seen corresponding path program 59 times [2021-06-05 05:14:59,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:59,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534480337] [2021-06-05 05:14:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:59,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:59,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534480337] [2021-06-05 05:14:59,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534480337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:59,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804049130] [2021-06-05 05:14:59,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:59,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:14:59,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:59,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:59,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:00,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:00,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:00,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:00,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:00,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:00,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:00,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:00,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:00,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804049130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:00,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:00,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:15:00,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532768043] [2021-06-05 05:15:00,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:00,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:00,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:00,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:00,143 INFO L87 Difference]: Start difference. First operand 5352 states and 24043 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:01,428 INFO L93 Difference]: Finished difference Result 6885 states and 29740 transitions. [2021-06-05 05:15:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:15:01,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:01,444 INFO L225 Difference]: With dead ends: 6885 [2021-06-05 05:15:01,444 INFO L226 Difference]: Without dead ends: 6587 [2021-06-05 05:15:01,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:15:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6587 states. [2021-06-05 05:15:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6587 to 5359. [2021-06-05 05:15:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 4.488801791713326) internal successors, (24051), 5358 states have internal predecessors, (24051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 24051 transitions. [2021-06-05 05:15:01,545 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 24051 transitions. Word has length 30 [2021-06-05 05:15:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:01,545 INFO L482 AbstractCegarLoop]: Abstraction has 5359 states and 24051 transitions. [2021-06-05 05:15:01,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 24051 transitions. [2021-06-05 05:15:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:01,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:01,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:01,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 05:15:01,754 INFO L430 AbstractCegarLoop]: === Iteration 217 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash 853505080, now seen corresponding path program 6 times [2021-06-05 05:15:01,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:01,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486207903] [2021-06-05 05:15:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:01,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:01,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486207903] [2021-06-05 05:15:01,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486207903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:01,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258416891] [2021-06-05 05:15:01,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:01,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:01,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:01,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:02,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:02,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:02,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 60 [2021-06-05 05:15:02,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:02,116 INFO L628 ElimStorePlain]: treesize reduction 5, result has 94.2 percent of original size [2021-06-05 05:15:02,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:02,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:870 [2021-06-05 05:15:02,516 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 05:15:02,750 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 05:15:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:02,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258416891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:02,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:02,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-06-05 05:15:02,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555467530] [2021-06-05 05:15:02,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:02,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:02,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:02,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:02,922 INFO L87 Difference]: Start difference. First operand 5359 states and 24051 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:03,367 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 05:15:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:05,329 INFO L93 Difference]: Finished difference Result 6640 states and 29394 transitions. [2021-06-05 05:15:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:15:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:05,344 INFO L225 Difference]: With dead ends: 6640 [2021-06-05 05:15:05,344 INFO L226 Difference]: Without dead ends: 6403 [2021-06-05 05:15:05,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1921.2ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:15:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2021-06-05 05:15:05,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 5429. [2021-06-05 05:15:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5429 states, 5428 states have (on average 4.5038688282977155) internal successors, (24447), 5428 states have internal predecessors, (24447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5429 states to 5429 states and 24447 transitions. [2021-06-05 05:15:05,444 INFO L78 Accepts]: Start accepts. Automaton has 5429 states and 24447 transitions. Word has length 30 [2021-06-05 05:15:05,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:05,444 INFO L482 AbstractCegarLoop]: Abstraction has 5429 states and 24447 transitions. [2021-06-05 05:15:05,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5429 states and 24447 transitions. [2021-06-05 05:15:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:05,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:05,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:05,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:05,654 INFO L430 AbstractCegarLoop]: === Iteration 218 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1927988576, now seen corresponding path program 35 times [2021-06-05 05:15:05,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:05,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684637996] [2021-06-05 05:15:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:05,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:05,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684637996] [2021-06-05 05:15:05,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684637996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:05,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124287672] [2021-06-05 05:15:05,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:05,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:05,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:05,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:05,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:06,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:06,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:06,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:06,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:15:06,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:06,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:06,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:06,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 05:15:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:06,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124287672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:06,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:06,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:06,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635926939] [2021-06-05 05:15:06,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:06,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:06,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:06,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:06,094 INFO L87 Difference]: Start difference. First operand 5429 states and 24447 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:07,113 INFO L93 Difference]: Finished difference Result 6079 states and 26957 transitions. [2021-06-05 05:15:07,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:15:07,113 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:07,127 INFO L225 Difference]: With dead ends: 6079 [2021-06-05 05:15:07,127 INFO L226 Difference]: Without dead ends: 5940 [2021-06-05 05:15:07,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:15:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2021-06-05 05:15:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 5436. [2021-06-05 05:15:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5436 states, 5435 states have (on average 4.50229990800368) internal successors, (24470), 5435 states have internal predecessors, (24470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5436 states to 5436 states and 24470 transitions. [2021-06-05 05:15:07,222 INFO L78 Accepts]: Start accepts. Automaton has 5436 states and 24470 transitions. Word has length 30 [2021-06-05 05:15:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:07,222 INFO L482 AbstractCegarLoop]: Abstraction has 5436 states and 24470 transitions. [2021-06-05 05:15:07,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5436 states and 24470 transitions. [2021-06-05 05:15:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:07,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:07,231 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:07,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:07,432 INFO L430 AbstractCegarLoop]: === Iteration 219 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:07,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1662609756, now seen corresponding path program 36 times [2021-06-05 05:15:07,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:07,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971887541] [2021-06-05 05:15:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:07,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:07,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971887541] [2021-06-05 05:15:07,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971887541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:07,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490478523] [2021-06-05 05:15:07,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:07,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:07,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:07,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:07,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:07,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:07,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-06-05 05:15:07,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:07,879 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.8 percent of original size [2021-06-05 05:15:07,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:07,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:405 [2021-06-05 05:15:08,078 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-06-05 05:15:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:08,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490478523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:08,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:08,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:15:08,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989076303] [2021-06-05 05:15:08,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:15:08,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:08,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:15:08,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:15:08,366 INFO L87 Difference]: Start difference. First operand 5436 states and 24470 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:10,489 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 05:15:10,623 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 05:15:11,035 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-05 05:15:11,213 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-06-05 05:15:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:11,844 INFO L93 Difference]: Finished difference Result 6587 states and 28946 transitions. [2021-06-05 05:15:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:15:11,844 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:11,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:11,858 INFO L225 Difference]: With dead ends: 6587 [2021-06-05 05:15:11,858 INFO L226 Difference]: Without dead ends: 6478 [2021-06-05 05:15:11,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2650.5ms TimeCoverageRelationStatistics Valid=370, Invalid=3412, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:15:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2021-06-05 05:15:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 5466. [2021-06-05 05:15:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5465 states have (on average 4.495150960658737) internal successors, (24566), 5465 states have internal predecessors, (24566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 24566 transitions. [2021-06-05 05:15:11,958 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 24566 transitions. Word has length 30 [2021-06-05 05:15:11,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:11,958 INFO L482 AbstractCegarLoop]: Abstraction has 5466 states and 24566 transitions. [2021-06-05 05:15:11,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:11,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 24566 transitions. [2021-06-05 05:15:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:11,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:11,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:12,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 05:15:12,168 INFO L430 AbstractCegarLoop]: === Iteration 220 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:12,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2099600558, now seen corresponding path program 37 times [2021-06-05 05:15:12,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:12,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568249321] [2021-06-05 05:15:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:12,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568249321] [2021-06-05 05:15:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568249321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708420654] [2021-06-05 05:15:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:12,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:12,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:12,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:12,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:12,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:12,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:12,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:12,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:12,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708420654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:12,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:12,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 05:15:12,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618868983] [2021-06-05 05:15:12,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:12,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:12,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:12,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:12,594 INFO L87 Difference]: Start difference. First operand 5466 states and 24566 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:13,585 INFO L93 Difference]: Finished difference Result 6005 states and 26631 transitions. [2021-06-05 05:15:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:13,585 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:13,598 INFO L225 Difference]: With dead ends: 6005 [2021-06-05 05:15:13,598 INFO L226 Difference]: Without dead ends: 5895 [2021-06-05 05:15:13,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:15:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2021-06-05 05:15:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 5482. [2021-06-05 05:15:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5482 states, 5481 states have (on average 4.4927932858967345) internal successors, (24625), 5481 states have internal predecessors, (24625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5482 states to 5482 states and 24625 transitions. [2021-06-05 05:15:13,687 INFO L78 Accepts]: Start accepts. Automaton has 5482 states and 24625 transitions. Word has length 30 [2021-06-05 05:15:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:13,687 INFO L482 AbstractCegarLoop]: Abstraction has 5482 states and 24625 transitions. [2021-06-05 05:15:13,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states and 24625 transitions. [2021-06-05 05:15:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:13,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:13,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:13,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 05:15:13,897 INFO L430 AbstractCegarLoop]: === Iteration 221 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1063411844, now seen corresponding path program 38 times [2021-06-05 05:15:13,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:13,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875760893] [2021-06-05 05:15:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:14,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:14,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875760893] [2021-06-05 05:15:14,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875760893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:14,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929762530] [2021-06-05 05:15:14,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:14,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:14,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:14,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:14,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:14,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:14,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:14,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:15:14,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:14,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:14,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:14,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-05 05:15:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:14,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929762530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:14,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:14,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:15:14,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5142802] [2021-06-05 05:15:14,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:14,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:14,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:14,595 INFO L87 Difference]: Start difference. First operand 5482 states and 24625 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:16,143 INFO L93 Difference]: Finished difference Result 6041 states and 26685 transitions. [2021-06-05 05:15:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:15:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:16,157 INFO L225 Difference]: With dead ends: 6041 [2021-06-05 05:15:16,158 INFO L226 Difference]: Without dead ends: 5846 [2021-06-05 05:15:16,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1306.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:15:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-06-05 05:15:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 5466. [2021-06-05 05:15:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5465 states have (on average 4.497712717291857) internal successors, (24580), 5465 states have internal predecessors, (24580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 24580 transitions. [2021-06-05 05:15:16,252 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 24580 transitions. Word has length 30 [2021-06-05 05:15:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:16,252 INFO L482 AbstractCegarLoop]: Abstraction has 5466 states and 24580 transitions. [2021-06-05 05:15:16,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 24580 transitions. [2021-06-05 05:15:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:16,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:16,262 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:16,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-06-05 05:15:16,462 INFO L430 AbstractCegarLoop]: === Iteration 222 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:16,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1581275744, now seen corresponding path program 7 times [2021-06-05 05:15:16,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:16,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990884934] [2021-06-05 05:15:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:16,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990884934] [2021-06-05 05:15:16,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990884934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352408474] [2021-06-05 05:15:16,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:16,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:16,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:16,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:16,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:16,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:16,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:16,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:16,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:16,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:16,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352408474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:16,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:16,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:15:16,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509942128] [2021-06-05 05:15:16,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:15:16,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:15:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:15:16,784 INFO L87 Difference]: Start difference. First operand 5466 states and 24580 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:17,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:17,268 INFO L93 Difference]: Finished difference Result 5970 states and 26447 transitions. [2021-06-05 05:15:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:15:17,268 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:17,281 INFO L225 Difference]: With dead ends: 5970 [2021-06-05 05:15:17,282 INFO L226 Difference]: Without dead ends: 5769 [2021-06-05 05:15:17,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-06-05 05:15:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 5476. [2021-06-05 05:15:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5476 states, 5475 states have (on average 4.497168949771689) internal successors, (24622), 5475 states have internal predecessors, (24622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5476 states to 5476 states and 24622 transitions. [2021-06-05 05:15:17,434 INFO L78 Accepts]: Start accepts. Automaton has 5476 states and 24622 transitions. Word has length 30 [2021-06-05 05:15:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:17,435 INFO L482 AbstractCegarLoop]: Abstraction has 5476 states and 24622 transitions. [2021-06-05 05:15:17,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5476 states and 24622 transitions. [2021-06-05 05:15:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:17,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:17,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:17,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:17,644 INFO L430 AbstractCegarLoop]: === Iteration 223 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1667325488, now seen corresponding path program 32 times [2021-06-05 05:15:17,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:17,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888836173] [2021-06-05 05:15:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:17,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:17,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888836173] [2021-06-05 05:15:17,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888836173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:17,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035835898] [2021-06-05 05:15:17,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:17,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:17,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:17,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:17,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:17,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:17,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:18,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:18,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:18,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:18,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035835898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:18,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:18,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:15:18,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78493960] [2021-06-05 05:15:18,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:18,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:18,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:18,047 INFO L87 Difference]: Start difference. First operand 5476 states and 24622 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:18,879 INFO L93 Difference]: Finished difference Result 5867 states and 26111 transitions. [2021-06-05 05:15:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:15:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:18,892 INFO L225 Difference]: With dead ends: 5867 [2021-06-05 05:15:18,893 INFO L226 Difference]: Without dead ends: 5769 [2021-06-05 05:15:18,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:15:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-06-05 05:15:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 5494. [2021-06-05 05:15:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 5493 states have (on average 4.493901328964136) internal successors, (24685), 5493 states have internal predecessors, (24685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 24685 transitions. [2021-06-05 05:15:18,982 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 24685 transitions. Word has length 30 [2021-06-05 05:15:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:18,983 INFO L482 AbstractCegarLoop]: Abstraction has 5494 states and 24685 transitions. [2021-06-05 05:15:18,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 24685 transitions. [2021-06-05 05:15:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:18,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:18,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:19,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:19,193 INFO L430 AbstractCegarLoop]: === Iteration 224 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:19,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2007157742, now seen corresponding path program 33 times [2021-06-05 05:15:19,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:19,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673553888] [2021-06-05 05:15:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:19,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:19,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673553888] [2021-06-05 05:15:19,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673553888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:19,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793669603] [2021-06-05 05:15:19,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:19,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:15:19,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:19,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:19,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:19,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:19,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 05:15:19,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:19,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:19,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:19,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-05 05:15:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:19,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793669603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:19,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:19,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:15:19,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723955437] [2021-06-05 05:15:19,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:19,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:19,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:19,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:19,753 INFO L87 Difference]: Start difference. First operand 5494 states and 24685 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:21,109 INFO L93 Difference]: Finished difference Result 6068 states and 26751 transitions. [2021-06-05 05:15:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:15:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:21,122 INFO L225 Difference]: With dead ends: 6068 [2021-06-05 05:15:21,123 INFO L226 Difference]: Without dead ends: 5848 [2021-06-05 05:15:21,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1011.8ms TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:15:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2021-06-05 05:15:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 5489. [2021-06-05 05:15:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 5488 states have (on average 4.494533527696793) internal successors, (24666), 5488 states have internal predecessors, (24666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 24666 transitions. [2021-06-05 05:15:21,216 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 24666 transitions. Word has length 30 [2021-06-05 05:15:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:21,217 INFO L482 AbstractCegarLoop]: Abstraction has 5489 states and 24666 transitions. [2021-06-05 05:15:21,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 24666 transitions. [2021-06-05 05:15:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:21,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:21,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:21,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:21,427 INFO L430 AbstractCegarLoop]: === Iteration 225 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:21,427 INFO L82 PathProgramCache]: Analyzing trace with hash 353883056, now seen corresponding path program 34 times [2021-06-05 05:15:21,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:21,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745905024] [2021-06-05 05:15:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:21,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745905024] [2021-06-05 05:15:21,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745905024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507541084] [2021-06-05 05:15:21,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:21,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:21,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:21,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:21,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:21,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:15:21,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:21,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:21,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:21,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 05:15:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:21,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507541084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:21,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:21,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:21,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050055452] [2021-06-05 05:15:21,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:21,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:21,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:21,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:21,872 INFO L87 Difference]: Start difference. First operand 5489 states and 24666 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:22,919 INFO L93 Difference]: Finished difference Result 6192 states and 27402 transitions. [2021-06-05 05:15:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:22,932 INFO L225 Difference]: With dead ends: 6192 [2021-06-05 05:15:22,932 INFO L226 Difference]: Without dead ends: 6075 [2021-06-05 05:15:22,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 710.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:15:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6075 states. [2021-06-05 05:15:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6075 to 5488. [2021-06-05 05:15:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5487 states have (on average 4.494805904866047) internal successors, (24663), 5487 states have internal predecessors, (24663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 24663 transitions. [2021-06-05 05:15:23,018 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 24663 transitions. Word has length 30 [2021-06-05 05:15:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:23,018 INFO L482 AbstractCegarLoop]: Abstraction has 5488 states and 24663 transitions. [2021-06-05 05:15:23,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 24663 transitions. [2021-06-05 05:15:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:23,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:23,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:23,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:23,228 INFO L430 AbstractCegarLoop]: === Iteration 226 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1932960114, now seen corresponding path program 39 times [2021-06-05 05:15:23,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:23,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291111610] [2021-06-05 05:15:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:23,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:23,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291111610] [2021-06-05 05:15:23,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291111610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:23,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612012514] [2021-06-05 05:15:23,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:23,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:15:23,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:23,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:23,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:23,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:23,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:23,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 05:15:23,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:23,641 INFO L628 ElimStorePlain]: treesize reduction 8, result has 89.3 percent of original size [2021-06-05 05:15:23,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:23,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:106 [2021-06-05 05:15:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:23,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612012514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:23,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:23,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:15:23,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143813440] [2021-06-05 05:15:23,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:23,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:23,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:23,771 INFO L87 Difference]: Start difference. First operand 5488 states and 24663 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:25,359 INFO L93 Difference]: Finished difference Result 6287 states and 27478 transitions. [2021-06-05 05:15:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:15:25,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:25,372 INFO L225 Difference]: With dead ends: 6287 [2021-06-05 05:15:25,372 INFO L226 Difference]: Without dead ends: 6067 [2021-06-05 05:15:25,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1023.9ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:15:25,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2021-06-05 05:15:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 5514. [2021-06-05 05:15:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5513 states have (on average 4.492835116996191) internal successors, (24769), 5513 states have internal predecessors, (24769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 24769 transitions. [2021-06-05 05:15:25,468 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 24769 transitions. Word has length 30 [2021-06-05 05:15:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:25,468 INFO L482 AbstractCegarLoop]: Abstraction has 5514 states and 24769 transitions. [2021-06-05 05:15:25,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 24769 transitions. [2021-06-05 05:15:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:25,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:25,477 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:25,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:25,678 INFO L430 AbstractCegarLoop]: === Iteration 227 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1222660956, now seen corresponding path program 35 times [2021-06-05 05:15:25,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:25,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404476529] [2021-06-05 05:15:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:25,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404476529] [2021-06-05 05:15:25,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404476529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018190827] [2021-06-05 05:15:25,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:25,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:25,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:26,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:26,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:26,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:26,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 05:15:26,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:26,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:26,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:26,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 05:15:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:26,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018190827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:26,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:26,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:15:26,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126337577] [2021-06-05 05:15:26,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:26,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:26,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:26,068 INFO L87 Difference]: Start difference. First operand 5514 states and 24769 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:27,204 INFO L93 Difference]: Finished difference Result 6459 states and 28394 transitions. [2021-06-05 05:15:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:15:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:27,219 INFO L225 Difference]: With dead ends: 6459 [2021-06-05 05:15:27,220 INFO L226 Difference]: Without dead ends: 6370 [2021-06-05 05:15:27,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 590.9ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:15:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6370 states. [2021-06-05 05:15:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6370 to 5506. [2021-06-05 05:15:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5506 states, 5505 states have (on average 4.493914623069936) internal successors, (24739), 5505 states have internal predecessors, (24739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5506 states to 5506 states and 24739 transitions. [2021-06-05 05:15:27,323 INFO L78 Accepts]: Start accepts. Automaton has 5506 states and 24739 transitions. Word has length 30 [2021-06-05 05:15:27,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:27,323 INFO L482 AbstractCegarLoop]: Abstraction has 5506 states and 24739 transitions. [2021-06-05 05:15:27,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5506 states and 24739 transitions. [2021-06-05 05:15:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:27,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:27,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:27,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:27,533 INFO L430 AbstractCegarLoop]: === Iteration 228 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:27,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:27,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1222272674, now seen corresponding path program 40 times [2021-06-05 05:15:27,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:27,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173515921] [2021-06-05 05:15:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:27,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:27,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173515921] [2021-06-05 05:15:27,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173515921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:27,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528170259] [2021-06-05 05:15:27,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:27,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:27,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:27,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:27,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:27,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:27,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:27,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:27,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:27,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:27,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528170259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:27,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:27,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 05:15:27,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358570294] [2021-06-05 05:15:27,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:27,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:27,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:27,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:27,927 INFO L87 Difference]: Start difference. First operand 5506 states and 24739 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:28,843 INFO L93 Difference]: Finished difference Result 6180 states and 27361 transitions. [2021-06-05 05:15:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:15:28,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:28,856 INFO L225 Difference]: With dead ends: 6180 [2021-06-05 05:15:28,856 INFO L226 Difference]: Without dead ends: 6107 [2021-06-05 05:15:28,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:15:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6107 states. [2021-06-05 05:15:28,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6107 to 5513. [2021-06-05 05:15:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 4.493105950653121) internal successors, (24766), 5512 states have internal predecessors, (24766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 24766 transitions. [2021-06-05 05:15:28,947 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 24766 transitions. Word has length 30 [2021-06-05 05:15:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:28,947 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 24766 transitions. [2021-06-05 05:15:28,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 24766 transitions. [2021-06-05 05:15:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:28,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:28,957 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:29,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-05 05:15:29,158 INFO L430 AbstractCegarLoop]: === Iteration 229 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:29,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1460216054, now seen corresponding path program 41 times [2021-06-05 05:15:29,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:29,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422711810] [2021-06-05 05:15:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:29,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:29,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422711810] [2021-06-05 05:15:29,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422711810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:29,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041621810] [2021-06-05 05:15:29,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:29,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:15:29,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:29,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:29,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:29,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:29,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:29,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:29,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:29,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:29,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:29,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:29,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:29,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041621810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:29,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:29,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 05:15:29,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519980521] [2021-06-05 05:15:29,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:29,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:29,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:29,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:29,565 INFO L87 Difference]: Start difference. First operand 5513 states and 24766 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:30,471 INFO L93 Difference]: Finished difference Result 6173 states and 27328 transitions. [2021-06-05 05:15:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:15:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:30,485 INFO L225 Difference]: With dead ends: 6173 [2021-06-05 05:15:30,485 INFO L226 Difference]: Without dead ends: 6098 [2021-06-05 05:15:30,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:15:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6098 states. [2021-06-05 05:15:30,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6098 to 5516. [2021-06-05 05:15:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 4.492475067996374) internal successors, (24776), 5515 states have internal predecessors, (24776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 24776 transitions. [2021-06-05 05:15:30,575 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 24776 transitions. Word has length 30 [2021-06-05 05:15:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:30,575 INFO L482 AbstractCegarLoop]: Abstraction has 5516 states and 24776 transitions. [2021-06-05 05:15:30,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 24776 transitions. [2021-06-05 05:15:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:30,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:30,584 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:30,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:30,785 INFO L430 AbstractCegarLoop]: === Iteration 230 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash 603104802, now seen corresponding path program 36 times [2021-06-05 05:15:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:30,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355055033] [2021-06-05 05:15:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:30,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:30,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355055033] [2021-06-05 05:15:30,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355055033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:30,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956483466] [2021-06-05 05:15:30,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:31,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:31,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:31,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:31,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:31,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:15:31,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:31,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:31,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:31,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 05:15:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:31,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956483466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:31,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:31,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 05:15:31,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371590921] [2021-06-05 05:15:31,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:31,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:31,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:31,322 INFO L87 Difference]: Start difference. First operand 5516 states and 24776 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:33,782 INFO L93 Difference]: Finished difference Result 7881 states and 33810 transitions. [2021-06-05 05:15:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:15:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:33,801 INFO L225 Difference]: With dead ends: 7881 [2021-06-05 05:15:33,801 INFO L226 Difference]: Without dead ends: 7773 [2021-06-05 05:15:33,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1452.8ms TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:15:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-05 05:15:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 5575. [2021-06-05 05:15:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 5574 states have (on average 4.488876928597057) internal successors, (25021), 5574 states have internal predecessors, (25021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 25021 transitions. [2021-06-05 05:15:33,929 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 25021 transitions. Word has length 30 [2021-06-05 05:15:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:33,929 INFO L482 AbstractCegarLoop]: Abstraction has 5575 states and 25021 transitions. [2021-06-05 05:15:33,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 25021 transitions. [2021-06-05 05:15:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:33,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:33,939 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:34,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:34,140 INFO L430 AbstractCegarLoop]: === Iteration 231 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:34,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:34,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1925833962, now seen corresponding path program 37 times [2021-06-05 05:15:34,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:34,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315763470] [2021-06-05 05:15:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:34,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:34,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315763470] [2021-06-05 05:15:34,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315763470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:34,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330313429] [2021-06-05 05:15:34,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:34,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:34,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:34,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:34,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:34,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:34,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:34,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:34,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:34,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:34,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330313429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:34,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:34,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 05:15:34,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091031195] [2021-06-05 05:15:34,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:15:34,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:34,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:15:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:15:34,521 INFO L87 Difference]: Start difference. First operand 5575 states and 25021 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:35,951 INFO L93 Difference]: Finished difference Result 8124 states and 34651 transitions. [2021-06-05 05:15:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:15:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:35,969 INFO L225 Difference]: With dead ends: 8124 [2021-06-05 05:15:35,969 INFO L226 Difference]: Without dead ends: 8036 [2021-06-05 05:15:35,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:15:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8036 states. [2021-06-05 05:15:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8036 to 5575. [2021-06-05 05:15:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 5574 states have (on average 4.488697524219591) internal successors, (25020), 5574 states have internal predecessors, (25020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 25020 transitions. [2021-06-05 05:15:36,097 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 25020 transitions. Word has length 30 [2021-06-05 05:15:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:36,097 INFO L482 AbstractCegarLoop]: Abstraction has 5575 states and 25020 transitions. [2021-06-05 05:15:36,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 25020 transitions. [2021-06-05 05:15:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:36,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:36,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:36,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 05:15:36,307 INFO L430 AbstractCegarLoop]: === Iteration 232 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash -726234836, now seen corresponding path program 60 times [2021-06-05 05:15:36,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:36,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82519676] [2021-06-05 05:15:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:36,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82519676] [2021-06-05 05:15:36,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82519676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602412638] [2021-06-05 05:15:36,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:36,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:15:36,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:36,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:36,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:36,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:36,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:36,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:36,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:36,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:36,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:36,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:36,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:36,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602412638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:36,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:36,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:15:36,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072276134] [2021-06-05 05:15:36,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:15:36,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:15:36,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:15:36,738 INFO L87 Difference]: Start difference. First operand 5575 states and 25020 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:38,173 INFO L93 Difference]: Finished difference Result 6204 states and 27446 transitions. [2021-06-05 05:15:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:15:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:38,187 INFO L225 Difference]: With dead ends: 6204 [2021-06-05 05:15:38,187 INFO L226 Difference]: Without dead ends: 6090 [2021-06-05 05:15:38,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1129.3ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6090 states. [2021-06-05 05:15:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6090 to 5599. [2021-06-05 05:15:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 5598 states have (on average 4.485709181850661) internal successors, (25111), 5598 states have internal predecessors, (25111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 25111 transitions. [2021-06-05 05:15:38,281 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 25111 transitions. Word has length 30 [2021-06-05 05:15:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:38,281 INFO L482 AbstractCegarLoop]: Abstraction has 5599 states and 25111 transitions. [2021-06-05 05:15:38,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 25111 transitions. [2021-06-05 05:15:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:38,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:38,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:38,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 05:15:38,490 INFO L430 AbstractCegarLoop]: === Iteration 233 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1039761232, now seen corresponding path program 61 times [2021-06-05 05:15:38,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:38,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655245093] [2021-06-05 05:15:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:38,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:38,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655245093] [2021-06-05 05:15:38,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655245093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:38,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639318942] [2021-06-05 05:15:38,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:38,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:38,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:38,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:38,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:38,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:38,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:38,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:38,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:38,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639318942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:38,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:38,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:15:38,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161783240] [2021-06-05 05:15:38,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:38,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:38,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:38,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:38,969 INFO L87 Difference]: Start difference. First operand 5599 states and 25111 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:40,655 INFO L93 Difference]: Finished difference Result 6328 states and 27921 transitions. [2021-06-05 05:15:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:15:40,656 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:40,670 INFO L225 Difference]: With dead ends: 6328 [2021-06-05 05:15:40,670 INFO L226 Difference]: Without dead ends: 6188 [2021-06-05 05:15:40,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1287.5ms TimeCoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:15:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6188 states. [2021-06-05 05:15:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6188 to 5594. [2021-06-05 05:15:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5594 states, 5593 states have (on average 4.486500983372072) internal successors, (25093), 5593 states have internal predecessors, (25093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5594 states to 5594 states and 25093 transitions. [2021-06-05 05:15:40,771 INFO L78 Accepts]: Start accepts. Automaton has 5594 states and 25093 transitions. Word has length 30 [2021-06-05 05:15:40,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:40,771 INFO L482 AbstractCegarLoop]: Abstraction has 5594 states and 25093 transitions. [2021-06-05 05:15:40,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 5594 states and 25093 transitions. [2021-06-05 05:15:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:40,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:40,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:40,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 05:15:40,982 INFO L430 AbstractCegarLoop]: === Iteration 234 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:40,982 INFO L82 PathProgramCache]: Analyzing trace with hash 418808324, now seen corresponding path program 62 times [2021-06-05 05:15:40,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:40,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035738007] [2021-06-05 05:15:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:41,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:41,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035738007] [2021-06-05 05:15:41,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035738007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:41,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788779969] [2021-06-05 05:15:41,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:41,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:41,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:41,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:41,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:41,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 05:15:41,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:41,421 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-05 05:15:41,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:15:41,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-06-05 05:15:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:41,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788779969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:41,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:41,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:15:41,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705043686] [2021-06-05 05:15:41,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:41,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:41,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:41,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:41,551 INFO L87 Difference]: Start difference. First operand 5594 states and 25093 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:43,183 INFO L93 Difference]: Finished difference Result 6585 states and 28779 transitions. [2021-06-05 05:15:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:15:43,183 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:43,198 INFO L225 Difference]: With dead ends: 6585 [2021-06-05 05:15:43,198 INFO L226 Difference]: Without dead ends: 6303 [2021-06-05 05:15:43,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1347.5ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:15:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2021-06-05 05:15:43,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 5611. [2021-06-05 05:15:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5611 states, 5610 states have (on average 4.486274509803922) internal successors, (25168), 5610 states have internal predecessors, (25168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5611 states to 5611 states and 25168 transitions. [2021-06-05 05:15:43,299 INFO L78 Accepts]: Start accepts. Automaton has 5611 states and 25168 transitions. Word has length 30 [2021-06-05 05:15:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:43,299 INFO L482 AbstractCegarLoop]: Abstraction has 5611 states and 25168 transitions. [2021-06-05 05:15:43,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5611 states and 25168 transitions. [2021-06-05 05:15:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:43,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:43,309 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:43,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:43,510 INFO L430 AbstractCegarLoop]: === Iteration 235 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:43,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:43,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1146174864, now seen corresponding path program 42 times [2021-06-05 05:15:43,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:43,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822243758] [2021-06-05 05:15:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:43,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:43,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822243758] [2021-06-05 05:15:43,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822243758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:43,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995384037] [2021-06-05 05:15:43,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:43,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:43,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:43,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:43,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:43,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:43,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 05:15:43,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:43,944 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-06-05 05:15:43,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:43,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 05:15:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:44,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995384037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:44,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:44,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:15:44,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123714259] [2021-06-05 05:15:44,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:15:44,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:44,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:15:44,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:15:44,022 INFO L87 Difference]: Start difference. First operand 5611 states and 25168 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:45,484 INFO L93 Difference]: Finished difference Result 6577 states and 29018 transitions. [2021-06-05 05:15:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:15:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:45,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:45,498 INFO L225 Difference]: With dead ends: 6577 [2021-06-05 05:15:45,498 INFO L226 Difference]: Without dead ends: 6451 [2021-06-05 05:15:45,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=252, Invalid=1818, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:15:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-05 05:15:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 5611. [2021-06-05 05:15:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5611 states, 5610 states have (on average 4.485561497326203) internal successors, (25164), 5610 states have internal predecessors, (25164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5611 states to 5611 states and 25164 transitions. [2021-06-05 05:15:45,590 INFO L78 Accepts]: Start accepts. Automaton has 5611 states and 25164 transitions. Word has length 30 [2021-06-05 05:15:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:45,590 INFO L482 AbstractCegarLoop]: Abstraction has 5611 states and 25164 transitions. [2021-06-05 05:15:45,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:45,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5611 states and 25164 transitions. [2021-06-05 05:15:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:45,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:45,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:45,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:45,799 INFO L430 AbstractCegarLoop]: === Iteration 236 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:45,800 INFO L82 PathProgramCache]: Analyzing trace with hash -441805900, now seen corresponding path program 43 times [2021-06-05 05:15:45,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:45,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804054195] [2021-06-05 05:15:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:46,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:46,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804054195] [2021-06-05 05:15:46,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804054195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:46,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751580326] [2021-06-05 05:15:46,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:46,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:46,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:15:46,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:46,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:46,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:46,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:15:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:46,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751580326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:46,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:46,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:15:46,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700314288] [2021-06-05 05:15:46,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:46,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:46,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:46,307 INFO L87 Difference]: Start difference. First operand 5611 states and 25164 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:47,652 INFO L93 Difference]: Finished difference Result 6142 states and 27174 transitions. [2021-06-05 05:15:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:15:47,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:47,665 INFO L225 Difference]: With dead ends: 6142 [2021-06-05 05:15:47,665 INFO L226 Difference]: Without dead ends: 6028 [2021-06-05 05:15:47,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 867.0ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2021-06-05 05:15:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 5622. [2021-06-05 05:15:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5622 states, 5621 states have (on average 4.484789183419321) internal successors, (25209), 5621 states have internal predecessors, (25209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5622 states to 5622 states and 25209 transitions. [2021-06-05 05:15:47,761 INFO L78 Accepts]: Start accepts. Automaton has 5622 states and 25209 transitions. Word has length 30 [2021-06-05 05:15:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:47,761 INFO L482 AbstractCegarLoop]: Abstraction has 5622 states and 25209 transitions. [2021-06-05 05:15:47,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 5622 states and 25209 transitions. [2021-06-05 05:15:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:47,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:47,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:47,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:47,971 INFO L430 AbstractCegarLoop]: === Iteration 237 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:47,971 INFO L82 PathProgramCache]: Analyzing trace with hash -974562882, now seen corresponding path program 44 times [2021-06-05 05:15:47,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:47,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987220293] [2021-06-05 05:15:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:48,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987220293] [2021-06-05 05:15:48,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987220293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:48,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283896932] [2021-06-05 05:15:48,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:48,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:48,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:48,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:48,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:48,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:48,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:48,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:15:48,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:48,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:48,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:48,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-05 05:15:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:48,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283896932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:48,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:48,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:15:48,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652067667] [2021-06-05 05:15:48,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:48,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:48,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:48,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:48,584 INFO L87 Difference]: Start difference. First operand 5622 states and 25209 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:50,338 INFO L93 Difference]: Finished difference Result 6176 states and 27227 transitions. [2021-06-05 05:15:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:15:50,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:50,352 INFO L225 Difference]: With dead ends: 6176 [2021-06-05 05:15:50,352 INFO L226 Difference]: Without dead ends: 6011 [2021-06-05 05:15:50,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1095.6ms TimeCoverageRelationStatistics Valid=227, Invalid=1495, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:15:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-05 05:15:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 5622. [2021-06-05 05:15:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5622 states, 5621 states have (on average 4.484077566269347) internal successors, (25205), 5621 states have internal predecessors, (25205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5622 states to 5622 states and 25205 transitions. [2021-06-05 05:15:50,443 INFO L78 Accepts]: Start accepts. Automaton has 5622 states and 25205 transitions. Word has length 30 [2021-06-05 05:15:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:50,443 INFO L482 AbstractCegarLoop]: Abstraction has 5622 states and 25205 transitions. [2021-06-05 05:15:50,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5622 states and 25205 transitions. [2021-06-05 05:15:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:50,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:50,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:50,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:50,657 INFO L430 AbstractCegarLoop]: === Iteration 238 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:50,657 INFO L82 PathProgramCache]: Analyzing trace with hash 740206354, now seen corresponding path program 63 times [2021-06-05 05:15:50,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:50,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786667483] [2021-06-05 05:15:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:50,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:50,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786667483] [2021-06-05 05:15:50,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786667483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:50,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783730871] [2021-06-05 05:15:50,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:50,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:50,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:50,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:50,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:51,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:51,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:51,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 05:15:51,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:51,098 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-05 05:15:51,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:15:51,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-06-05 05:15:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:51,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783730871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:51,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:51,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:15:51,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827473097] [2021-06-05 05:15:51,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:51,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:51,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:51,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:51,265 INFO L87 Difference]: Start difference. First operand 5622 states and 25205 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:53,309 INFO L93 Difference]: Finished difference Result 6657 states and 29050 transitions. [2021-06-05 05:15:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:15:53,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:53,324 INFO L225 Difference]: With dead ends: 6657 [2021-06-05 05:15:53,324 INFO L226 Difference]: Without dead ends: 6375 [2021-06-05 05:15:53,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1485.3ms TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:15:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2021-06-05 05:15:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 5641. [2021-06-05 05:15:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5640 states have (on average 4.483156028368795) internal successors, (25285), 5640 states have internal predecessors, (25285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 25285 transitions. [2021-06-05 05:15:53,457 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 25285 transitions. Word has length 30 [2021-06-05 05:15:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:53,457 INFO L482 AbstractCegarLoop]: Abstraction has 5641 states and 25285 transitions. [2021-06-05 05:15:53,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 25285 transitions. [2021-06-05 05:15:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:53,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:53,467 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:53,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-05 05:15:53,667 INFO L430 AbstractCegarLoop]: === Iteration 239 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:53,668 INFO L82 PathProgramCache]: Analyzing trace with hash -824776834, now seen corresponding path program 45 times [2021-06-05 05:15:53,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:53,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968208941] [2021-06-05 05:15:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:53,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:53,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968208941] [2021-06-05 05:15:53,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968208941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:53,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814162806] [2021-06-05 05:15:53,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:53,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:53,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:53,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:54,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:54,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:54,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:15:54,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:54,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:54,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:54,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 05:15:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:54,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814162806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:54,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:54,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:54,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962866570] [2021-06-05 05:15:54,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:54,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:54,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:54,145 INFO L87 Difference]: Start difference. First operand 5641 states and 25285 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:55,262 INFO L93 Difference]: Finished difference Result 6310 states and 27865 transitions. [2021-06-05 05:15:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:15:55,262 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:55,276 INFO L225 Difference]: With dead ends: 6310 [2021-06-05 05:15:55,276 INFO L226 Difference]: Without dead ends: 6171 [2021-06-05 05:15:55,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:15:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6171 states. [2021-06-05 05:15:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 5653. [2021-06-05 05:15:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5653 states, 5652 states have (on average 4.479830148619958) internal successors, (25320), 5652 states have internal predecessors, (25320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5653 states to 5653 states and 25320 transitions. [2021-06-05 05:15:55,376 INFO L78 Accepts]: Start accepts. Automaton has 5653 states and 25320 transitions. Word has length 30 [2021-06-05 05:15:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:55,376 INFO L482 AbstractCegarLoop]: Abstraction has 5653 states and 25320 transitions. [2021-06-05 05:15:55,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5653 states and 25320 transitions. [2021-06-05 05:15:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:55,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:55,385 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:55,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:55,586 INFO L430 AbstractCegarLoop]: === Iteration 240 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1020757778, now seen corresponding path program 46 times [2021-06-05 05:15:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:55,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354873492] [2021-06-05 05:15:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:55,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:55,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354873492] [2021-06-05 05:15:55,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354873492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:55,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195188490] [2021-06-05 05:15:55,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:55,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:55,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:55,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:55,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:55,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:55,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:15:55,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:55,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:55,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:55,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 05:15:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:55,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195188490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:55,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:55,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:55,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221187203] [2021-06-05 05:15:55,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:55,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:55,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:55,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:55,993 INFO L87 Difference]: Start difference. First operand 5653 states and 25320 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:57,374 INFO L93 Difference]: Finished difference Result 6753 states and 29585 transitions. [2021-06-05 05:15:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:15:57,375 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:57,389 INFO L225 Difference]: With dead ends: 6753 [2021-06-05 05:15:57,389 INFO L226 Difference]: Without dead ends: 6620 [2021-06-05 05:15:57,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 830.1ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:15:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-06-05 05:15:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 5673. [2021-06-05 05:15:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5673 states, 5672 states have (on average 4.474612129760225) internal successors, (25380), 5672 states have internal predecessors, (25380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5673 states to 5673 states and 25380 transitions. [2021-06-05 05:15:57,485 INFO L78 Accepts]: Start accepts. Automaton has 5673 states and 25380 transitions. Word has length 30 [2021-06-05 05:15:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:57,485 INFO L482 AbstractCegarLoop]: Abstraction has 5673 states and 25380 transitions. [2021-06-05 05:15:57,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5673 states and 25380 transitions. [2021-06-05 05:15:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:57,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:57,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:57,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-05 05:15:57,695 INFO L430 AbstractCegarLoop]: === Iteration 241 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1527104044, now seen corresponding path program 47 times [2021-06-05 05:15:57,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:57,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631470870] [2021-06-05 05:15:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:57,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:57,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631470870] [2021-06-05 05:15:57,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631470870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:57,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956979816] [2021-06-05 05:15:57,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:57,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:57,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:57,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:58,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:58,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:58,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:15:58,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:58,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:58,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:58,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 05:15:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:58,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956979816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:58,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:58,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:15:58,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68923215] [2021-06-05 05:15:58,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:58,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:58,109 INFO L87 Difference]: Start difference. First operand 5673 states and 25380 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:59,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:59,249 INFO L93 Difference]: Finished difference Result 6319 states and 27877 transitions. [2021-06-05 05:15:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:15:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:59,263 INFO L225 Difference]: With dead ends: 6319 [2021-06-05 05:15:59,263 INFO L226 Difference]: Without dead ends: 6164 [2021-06-05 05:15:59,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 617.7ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:15:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6164 states. [2021-06-05 05:15:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6164 to 5657. [2021-06-05 05:15:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5657 states, 5656 states have (on average 4.478606789250354) internal successors, (25331), 5656 states have internal predecessors, (25331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5657 states to 5657 states and 25331 transitions. [2021-06-05 05:15:59,356 INFO L78 Accepts]: Start accepts. Automaton has 5657 states and 25331 transitions. Word has length 30 [2021-06-05 05:15:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:59,356 INFO L482 AbstractCegarLoop]: Abstraction has 5657 states and 25331 transitions. [2021-06-05 05:15:59,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5657 states and 25331 transitions. [2021-06-05 05:15:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:59,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:59,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:59,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:59,569 INFO L430 AbstractCegarLoop]: === Iteration 242 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash 423059838, now seen corresponding path program 48 times [2021-06-05 05:15:59,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:59,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017573113] [2021-06-05 05:15:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:59,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:59,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017573113] [2021-06-05 05:15:59,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017573113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:59,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30742106] [2021-06-05 05:15:59,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:59,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:59,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:59,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:59,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:00,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:00,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:00,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 05:16:00,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:00,097 INFO L628 ElimStorePlain]: treesize reduction 5, result has 92.5 percent of original size [2021-06-05 05:16:00,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:00,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:472 [2021-06-05 05:16:00,281 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 05:16:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:00,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30742106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:00,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:00,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:16:00,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845413370] [2021-06-05 05:16:00,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:16:00,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:00,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:16:00,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:00,645 INFO L87 Difference]: Start difference. First operand 5657 states and 25331 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:02,737 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 05:16:03,838 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 05:16:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:03,839 INFO L93 Difference]: Finished difference Result 6721 states and 29437 transitions. [2021-06-05 05:16:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:16:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:03,854 INFO L225 Difference]: With dead ends: 6721 [2021-06-05 05:16:03,855 INFO L226 Difference]: Without dead ends: 6612 [2021-06-05 05:16:03,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2666.9ms TimeCoverageRelationStatistics Valid=443, Invalid=3717, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:16:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6612 states. [2021-06-05 05:16:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6612 to 5685. [2021-06-05 05:16:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5685 states, 5684 states have (on average 4.474313863476425) internal successors, (25432), 5684 states have internal predecessors, (25432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5685 states to 5685 states and 25432 transitions. [2021-06-05 05:16:03,951 INFO L78 Accepts]: Start accepts. Automaton has 5685 states and 25432 transitions. Word has length 30 [2021-06-05 05:16:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:03,951 INFO L482 AbstractCegarLoop]: Abstraction has 5685 states and 25432 transitions. [2021-06-05 05:16:03,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5685 states and 25432 transitions. [2021-06-05 05:16:03,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:03,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:03,960 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:04,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 05:16:04,161 INFO L430 AbstractCegarLoop]: === Iteration 243 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash -972527238, now seen corresponding path program 49 times [2021-06-05 05:16:04,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:04,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440300735] [2021-06-05 05:16:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:04,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:04,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440300735] [2021-06-05 05:16:04,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440300735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:04,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909388848] [2021-06-05 05:16:04,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:04,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:04,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:04,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:04,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:04,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:04,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:04,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:04,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:04,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:16:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:04,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909388848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:04,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:04,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:16:04,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871751647] [2021-06-05 05:16:04,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:04,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:04,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:04,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:04,652 INFO L87 Difference]: Start difference. First operand 5685 states and 25432 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:06,822 INFO L93 Difference]: Finished difference Result 6382 states and 27917 transitions. [2021-06-05 05:16:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:16:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:06,836 INFO L225 Difference]: With dead ends: 6382 [2021-06-05 05:16:06,836 INFO L226 Difference]: Without dead ends: 6232 [2021-06-05 05:16:06,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1748.6ms TimeCoverageRelationStatistics Valid=579, Invalid=3453, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:16:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6232 states. [2021-06-05 05:16:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6232 to 5689. [2021-06-05 05:16:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5689 states, 5688 states have (on average 4.473101265822785) internal successors, (25443), 5688 states have internal predecessors, (25443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5689 states to 5689 states and 25443 transitions. [2021-06-05 05:16:06,932 INFO L78 Accepts]: Start accepts. Automaton has 5689 states and 25443 transitions. Word has length 30 [2021-06-05 05:16:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:06,932 INFO L482 AbstractCegarLoop]: Abstraction has 5689 states and 25443 transitions. [2021-06-05 05:16:06,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:06,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5689 states and 25443 transitions. [2021-06-05 05:16:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:06,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:06,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:07,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:07,143 INFO L430 AbstractCegarLoop]: === Iteration 244 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:07,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1336230824, now seen corresponding path program 50 times [2021-06-05 05:16:07,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:07,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745271068] [2021-06-05 05:16:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:07,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:07,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745271068] [2021-06-05 05:16:07,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745271068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:07,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883638782] [2021-06-05 05:16:07,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:07,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:07,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:07,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:07,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:07,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:07,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:07,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:16:07,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:07,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 05:16:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:07,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883638782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:07,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:07,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:16:07,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394957093] [2021-06-05 05:16:07,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:07,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:07,832 INFO L87 Difference]: Start difference. First operand 5689 states and 25443 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:09,706 INFO L93 Difference]: Finished difference Result 6232 states and 27434 transitions. [2021-06-05 05:16:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:16:09,707 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:09,719 INFO L225 Difference]: With dead ends: 6232 [2021-06-05 05:16:09,720 INFO L226 Difference]: Without dead ends: 6058 [2021-06-05 05:16:09,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1411.2ms TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:16:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2021-06-05 05:16:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 5692. [2021-06-05 05:16:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 4.473203303461606) internal successors, (25457), 5691 states have internal predecessors, (25457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:09,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 25457 transitions. [2021-06-05 05:16:09,811 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 25457 transitions. Word has length 30 [2021-06-05 05:16:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:09,811 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 25457 transitions. [2021-06-05 05:16:09,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:09,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 25457 transitions. [2021-06-05 05:16:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:09,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:09,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:10,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-05 05:16:10,020 INFO L430 AbstractCegarLoop]: === Iteration 245 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:10,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1868987806, now seen corresponding path program 51 times [2021-06-05 05:16:10,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:10,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033188342] [2021-06-05 05:16:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:10,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:10,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033188342] [2021-06-05 05:16:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033188342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603718538] [2021-06-05 05:16:10,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:10,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:16:10,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:10,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:10,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:10,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:10,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:10,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:16:10,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:10,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 05:16:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:10,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603718538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:10,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:16:10,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431998469] [2021-06-05 05:16:10,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:10,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:10,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:10,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:10,650 INFO L87 Difference]: Start difference. First operand 5692 states and 25457 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:11,954 INFO L93 Difference]: Finished difference Result 6151 states and 27130 transitions. [2021-06-05 05:16:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:16:11,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:11,967 INFO L225 Difference]: With dead ends: 6151 [2021-06-05 05:16:11,967 INFO L226 Difference]: Without dead ends: 6004 [2021-06-05 05:16:11,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1038.7ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:16:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2021-06-05 05:16:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 5692. [2021-06-05 05:16:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 4.4725004392901075) internal successors, (25453), 5691 states have internal predecessors, (25453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 25453 transitions. [2021-06-05 05:16:12,056 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 25453 transitions. Word has length 30 [2021-06-05 05:16:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:12,056 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 25453 transitions. [2021-06-05 05:16:12,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 25453 transitions. [2021-06-05 05:16:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:12,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:12,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:12,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 05:16:12,265 INFO L430 AbstractCegarLoop]: === Iteration 246 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash 580244706, now seen corresponding path program 52 times [2021-06-05 05:16:12,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:12,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356444572] [2021-06-05 05:16:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:12,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:12,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356444572] [2021-06-05 05:16:12,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356444572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:12,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068370723] [2021-06-05 05:16:12,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:12,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:12,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:12,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:12,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:12,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:12,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:12,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:12,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:12,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:12,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:12,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:16:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:12,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068370723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:12,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:12,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:16:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442311682] [2021-06-05 05:16:12,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:12,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:12,722 INFO L87 Difference]: Start difference. First operand 5692 states and 25453 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:14,941 INFO L93 Difference]: Finished difference Result 6381 states and 27946 transitions. [2021-06-05 05:16:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:16:14,941 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:14,955 INFO L225 Difference]: With dead ends: 6381 [2021-06-05 05:16:14,955 INFO L226 Difference]: Without dead ends: 6250 [2021-06-05 05:16:14,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1669.8ms TimeCoverageRelationStatistics Valid=552, Invalid=3230, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:16:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2021-06-05 05:16:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 5710. [2021-06-05 05:16:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 4.468733578560168) internal successors, (25512), 5709 states have internal predecessors, (25512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 25512 transitions. [2021-06-05 05:16:15,082 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 25512 transitions. Word has length 30 [2021-06-05 05:16:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:15,082 INFO L482 AbstractCegarLoop]: Abstraction has 5710 states and 25512 transitions. [2021-06-05 05:16:15,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:15,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 25512 transitions. [2021-06-05 05:16:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:15,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:15,091 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:15,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:15,292 INFO L430 AbstractCegarLoop]: === Iteration 247 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:15,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1970358584, now seen corresponding path program 53 times [2021-06-05 05:16:15,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:15,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210402952] [2021-06-05 05:16:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:15,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:15,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210402952] [2021-06-05 05:16:15,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210402952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:15,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017609676] [2021-06-05 05:16:15,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:15,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:15,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:15,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:16:15,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:15,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:15,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:15,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:15,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 05:16:15,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:15,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:15,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:15,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-06-05 05:16:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:15,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017609676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:15,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:15,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:16:15,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021214941] [2021-06-05 05:16:15,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:16:15,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:15,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:16:15,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:15,922 INFO L87 Difference]: Start difference. First operand 5710 states and 25512 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:17,155 INFO L93 Difference]: Finished difference Result 6435 states and 28449 transitions. [2021-06-05 05:16:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:16:17,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:17,169 INFO L225 Difference]: With dead ends: 6435 [2021-06-05 05:16:17,169 INFO L226 Difference]: Without dead ends: 6367 [2021-06-05 05:16:17,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1097.0ms TimeCoverageRelationStatistics Valid=208, Invalid=1772, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:16:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2021-06-05 05:16:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 5709. [2021-06-05 05:16:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 4.46916608269096) internal successors, (25510), 5708 states have internal predecessors, (25510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 25510 transitions. [2021-06-05 05:16:17,259 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 25510 transitions. Word has length 30 [2021-06-05 05:16:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:17,259 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 25510 transitions. [2021-06-05 05:16:17,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 25510 transitions. [2021-06-05 05:16:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:17,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:17,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:17,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:17,469 INFO L430 AbstractCegarLoop]: === Iteration 248 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:17,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1799244982, now seen corresponding path program 54 times [2021-06-05 05:16:17,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:17,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37708481] [2021-06-05 05:16:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:17,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:17,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37708481] [2021-06-05 05:16:17,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37708481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:17,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125304665] [2021-06-05 05:16:17,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:17,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:16:17,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:17,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:16:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:17,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:17,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:17,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 05:16:17,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:17,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:17,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:17,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:57 [2021-06-05 05:16:18,043 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 05:16:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125304665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:18,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:18,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:16:18,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763889802] [2021-06-05 05:16:18,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:18,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:18,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:18,223 INFO L87 Difference]: Start difference. First operand 5709 states and 25510 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:18,882 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-05 05:16:19,123 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-06-05 05:16:19,315 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-06-05 05:16:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:21,622 INFO L93 Difference]: Finished difference Result 6776 states and 29685 transitions. [2021-06-05 05:16:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:16:21,623 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:21,637 INFO L225 Difference]: With dead ends: 6776 [2021-06-05 05:16:21,637 INFO L226 Difference]: Without dead ends: 6619 [2021-06-05 05:16:21,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2896.0ms TimeCoverageRelationStatistics Valid=467, Invalid=3439, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:16:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6619 states. [2021-06-05 05:16:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6619 to 5689. [2021-06-05 05:16:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5689 states, 5688 states have (on average 4.472925457102672) internal successors, (25442), 5688 states have internal predecessors, (25442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5689 states to 5689 states and 25442 transitions. [2021-06-05 05:16:21,736 INFO L78 Accepts]: Start accepts. Automaton has 5689 states and 25442 transitions. Word has length 30 [2021-06-05 05:16:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:21,736 INFO L482 AbstractCegarLoop]: Abstraction has 5689 states and 25442 transitions. [2021-06-05 05:16:21,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5689 states and 25442 transitions. [2021-06-05 05:16:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:21,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:21,745 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:21,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 05:16:21,946 INFO L430 AbstractCegarLoop]: === Iteration 249 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:21,946 INFO L82 PathProgramCache]: Analyzing trace with hash -626091868, now seen corresponding path program 55 times [2021-06-05 05:16:21,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:21,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814875204] [2021-06-05 05:16:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:22,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:22,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814875204] [2021-06-05 05:16:22,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814875204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:22,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724602292] [2021-06-05 05:16:22,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:22,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:22,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:22,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:22,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:22,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:22,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:22,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:22,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:22,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:16:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:22,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724602292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:22,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:22,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:16:22,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700033720] [2021-06-05 05:16:22,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:16:22,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:22,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:16:22,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:16:22,423 INFO L87 Difference]: Start difference. First operand 5689 states and 25442 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:23,638 INFO L93 Difference]: Finished difference Result 6232 states and 27534 transitions. [2021-06-05 05:16:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:16:23,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:23,653 INFO L225 Difference]: With dead ends: 6232 [2021-06-05 05:16:23,653 INFO L226 Difference]: Without dead ends: 6095 [2021-06-05 05:16:23,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 860.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:16:23,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2021-06-05 05:16:23,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 5698. [2021-06-05 05:16:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5698 states, 5697 states have (on average 4.470774091627172) internal successors, (25470), 5697 states have internal predecessors, (25470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:23,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5698 states to 5698 states and 25470 transitions. [2021-06-05 05:16:23,758 INFO L78 Accepts]: Start accepts. Automaton has 5698 states and 25470 transitions. Word has length 30 [2021-06-05 05:16:23,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:23,758 INFO L482 AbstractCegarLoop]: Abstraction has 5698 states and 25470 transitions. [2021-06-05 05:16:23,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:23,758 INFO L276 IsEmpty]: Start isEmpty. Operand 5698 states and 25470 transitions. [2021-06-05 05:16:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:23,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:23,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:23,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:23,969 INFO L430 AbstractCegarLoop]: === Iteration 250 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash 97329558, now seen corresponding path program 8 times [2021-06-05 05:16:23,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:23,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266257013] [2021-06-05 05:16:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:24,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:24,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266257013] [2021-06-05 05:16:24,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266257013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:24,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705768652] [2021-06-05 05:16:24,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:24,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:24,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:24,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:24,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:24,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:24,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:24,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:24,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:24,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:24,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:24,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:16:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:24,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705768652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:24,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:24,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:16:24,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960445409] [2021-06-05 05:16:24,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:16:24,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:24,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:16:24,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:16:24,307 INFO L87 Difference]: Start difference. First operand 5698 states and 25470 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:24,920 INFO L93 Difference]: Finished difference Result 6221 states and 27393 transitions. [2021-06-05 05:16:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:16:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:24,934 INFO L225 Difference]: With dead ends: 6221 [2021-06-05 05:16:24,934 INFO L226 Difference]: Without dead ends: 6020 [2021-06-05 05:16:24,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6020 states. [2021-06-05 05:16:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6020 to 5701. [2021-06-05 05:16:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 5700 states have (on average 4.470701754385965) internal successors, (25483), 5700 states have internal predecessors, (25483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 25483 transitions. [2021-06-05 05:16:25,032 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 25483 transitions. Word has length 30 [2021-06-05 05:16:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:25,032 INFO L482 AbstractCegarLoop]: Abstraction has 5701 states and 25483 transitions. [2021-06-05 05:16:25,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 25483 transitions. [2021-06-05 05:16:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:25,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:25,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:25,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:25,245 INFO L430 AbstractCegarLoop]: === Iteration 251 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:25,245 INFO L82 PathProgramCache]: Analyzing trace with hash -949036506, now seen corresponding path program 38 times [2021-06-05 05:16:25,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:25,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106145559] [2021-06-05 05:16:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:25,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:25,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106145559] [2021-06-05 05:16:25,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106145559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:25,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608262125] [2021-06-05 05:16:25,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:25,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:25,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:25,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:25,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:25,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:25,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:25,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:25,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:25,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:25,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:25,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:16:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:25,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608262125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:25,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:25,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:16:25,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312545091] [2021-06-05 05:16:25,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:25,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:25,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:25,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:25,677 INFO L87 Difference]: Start difference. First operand 5701 states and 25483 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:26,366 INFO L93 Difference]: Finished difference Result 6090 states and 26960 transitions. [2021-06-05 05:16:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:16:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:26,380 INFO L225 Difference]: With dead ends: 6090 [2021-06-05 05:16:26,381 INFO L226 Difference]: Without dead ends: 5992 [2021-06-05 05:16:26,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:16:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5992 states. [2021-06-05 05:16:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5992 to 5722. [2021-06-05 05:16:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 5721 states have (on average 4.468274777136864) internal successors, (25563), 5721 states have internal predecessors, (25563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 25563 transitions. [2021-06-05 05:16:26,483 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 25563 transitions. Word has length 30 [2021-06-05 05:16:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:26,483 INFO L482 AbstractCegarLoop]: Abstraction has 5722 states and 25563 transitions. [2021-06-05 05:16:26,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 25563 transitions. [2021-06-05 05:16:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:26,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:26,494 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:26,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:26,694 INFO L430 AbstractCegarLoop]: === Iteration 252 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:26,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:26,694 INFO L82 PathProgramCache]: Analyzing trace with hash -328552440, now seen corresponding path program 39 times [2021-06-05 05:16:26,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:26,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661999226] [2021-06-05 05:16:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:26,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661999226] [2021-06-05 05:16:26,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661999226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228721468] [2021-06-05 05:16:26,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:26,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:16:26,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:27,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:27,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:27,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 05:16:27,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:27,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:27,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:27,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-05 05:16:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:27,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228721468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:27,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:27,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:16:27,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783722802] [2021-06-05 05:16:27,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:27,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:27,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:27,255 INFO L87 Difference]: Start difference. First operand 5722 states and 25563 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:28,546 INFO L93 Difference]: Finished difference Result 6202 states and 27330 transitions. [2021-06-05 05:16:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:16:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:28,559 INFO L225 Difference]: With dead ends: 6202 [2021-06-05 05:16:28,559 INFO L226 Difference]: Without dead ends: 6050 [2021-06-05 05:16:28,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 970.9ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:16:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6050 states. [2021-06-05 05:16:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6050 to 5713. [2021-06-05 05:16:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5713 states, 5712 states have (on average 4.4693627450980395) internal successors, (25529), 5712 states have internal predecessors, (25529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5713 states to 5713 states and 25529 transitions. [2021-06-05 05:16:28,654 INFO L78 Accepts]: Start accepts. Automaton has 5713 states and 25529 transitions. Word has length 30 [2021-06-05 05:16:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:28,654 INFO L482 AbstractCegarLoop]: Abstraction has 5713 states and 25529 transitions. [2021-06-05 05:16:28,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5713 states and 25529 transitions. [2021-06-05 05:16:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:28,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:28,663 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:28,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-06-05 05:16:28,864 INFO L430 AbstractCegarLoop]: === Iteration 253 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2032488358, now seen corresponding path program 40 times [2021-06-05 05:16:28,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:28,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045409056] [2021-06-05 05:16:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:29,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:29,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045409056] [2021-06-05 05:16:29,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045409056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:29,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820712332] [2021-06-05 05:16:29,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:29,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:29,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:29,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:29,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:29,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:29,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:29,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:16:29,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:29,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:29,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:29,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 05:16:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:29,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820712332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:29,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:29,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:16:29,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542652956] [2021-06-05 05:16:29,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:29,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:29,360 INFO L87 Difference]: Start difference. First operand 5713 states and 25529 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:30,531 INFO L93 Difference]: Finished difference Result 6411 states and 28241 transitions. [2021-06-05 05:16:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:16:30,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:30,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:30,545 INFO L225 Difference]: With dead ends: 6411 [2021-06-05 05:16:30,545 INFO L226 Difference]: Without dead ends: 6294 [2021-06-05 05:16:30,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 793.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:16:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-06-05 05:16:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 5707. [2021-06-05 05:16:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5707 states, 5706 states have (on average 4.470206799859796) internal successors, (25507), 5706 states have internal predecessors, (25507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5707 states to 5707 states and 25507 transitions. [2021-06-05 05:16:30,642 INFO L78 Accepts]: Start accepts. Automaton has 5707 states and 25507 transitions. Word has length 30 [2021-06-05 05:16:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:30,642 INFO L482 AbstractCegarLoop]: Abstraction has 5707 states and 25507 transitions. [2021-06-05 05:16:30,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 5707 states and 25507 transitions. [2021-06-05 05:16:30,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:30,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:30,652 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:30,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:30,852 INFO L430 AbstractCegarLoop]: === Iteration 254 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:30,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:30,853 INFO L82 PathProgramCache]: Analyzing trace with hash -782480168, now seen corresponding path program 41 times [2021-06-05 05:16:30,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:30,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501223726] [2021-06-05 05:16:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:31,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:31,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501223726] [2021-06-05 05:16:31,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501223726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:31,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349781254] [2021-06-05 05:16:31,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:31,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:31,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:31,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:31,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:31,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:31,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:31,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:31,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:31,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:31,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:16:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:31,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349781254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:31,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:31,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:16:31,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315972964] [2021-06-05 05:16:31,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:31,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:31,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:31,221 INFO L87 Difference]: Start difference. First operand 5707 states and 25507 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:32,114 INFO L93 Difference]: Finished difference Result 6203 states and 27399 transitions. [2021-06-05 05:16:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:16:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:32,127 INFO L225 Difference]: With dead ends: 6203 [2021-06-05 05:16:32,127 INFO L226 Difference]: Without dead ends: 6105 [2021-06-05 05:16:32,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 644.8ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:16:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6105 states. [2021-06-05 05:16:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6105 to 5737. [2021-06-05 05:16:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5737 states, 5736 states have (on average 4.466352859135286) internal successors, (25619), 5736 states have internal predecessors, (25619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5737 states to 5737 states and 25619 transitions. [2021-06-05 05:16:32,224 INFO L78 Accepts]: Start accepts. Automaton has 5737 states and 25619 transitions. Word has length 30 [2021-06-05 05:16:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:32,224 INFO L482 AbstractCegarLoop]: Abstraction has 5737 states and 25619 transitions. [2021-06-05 05:16:32,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5737 states and 25619 transitions. [2021-06-05 05:16:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:32,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:32,234 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:32,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:32,434 INFO L430 AbstractCegarLoop]: === Iteration 255 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:32,435 INFO L82 PathProgramCache]: Analyzing trace with hash 743590910, now seen corresponding path program 42 times [2021-06-05 05:16:32,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:32,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718839913] [2021-06-05 05:16:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:32,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:32,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718839913] [2021-06-05 05:16:32,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718839913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:32,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854472804] [2021-06-05 05:16:32,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:32,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:16:32,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:32,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:32,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:32,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:32,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:32,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:32,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:32,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:32,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:32,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:16:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:32,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854472804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:32,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:32,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:16:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868267022] [2021-06-05 05:16:32,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:32,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:32,847 INFO L87 Difference]: Start difference. First operand 5737 states and 25619 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:33,582 INFO L93 Difference]: Finished difference Result 6229 states and 27484 transitions. [2021-06-05 05:16:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:16:33,582 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:33,596 INFO L225 Difference]: With dead ends: 6229 [2021-06-05 05:16:33,596 INFO L226 Difference]: Without dead ends: 6126 [2021-06-05 05:16:33,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 667.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:16:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-06-05 05:16:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 5729. [2021-06-05 05:16:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5729 states, 5728 states have (on average 4.466655027932961) internal successors, (25585), 5728 states have internal predecessors, (25585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 25585 transitions. [2021-06-05 05:16:33,688 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 25585 transitions. Word has length 30 [2021-06-05 05:16:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:33,688 INFO L482 AbstractCegarLoop]: Abstraction has 5729 states and 25585 transitions. [2021-06-05 05:16:33,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 25585 transitions. [2021-06-05 05:16:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:33,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:33,699 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:33,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:33,911 INFO L430 AbstractCegarLoop]: === Iteration 256 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:33,911 INFO L82 PathProgramCache]: Analyzing trace with hash 961883838, now seen corresponding path program 43 times [2021-06-05 05:16:33,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:33,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308258266] [2021-06-05 05:16:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:34,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:34,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308258266] [2021-06-05 05:16:34,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308258266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:34,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704299378] [2021-06-05 05:16:34,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:34,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:34,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:34,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:34,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:34,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:34,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:34,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:34,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:34,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:16:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:34,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704299378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:34,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:34,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:16:34,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965240873] [2021-06-05 05:16:34,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:16:34,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:16:34,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:16:34,297 INFO L87 Difference]: Start difference. First operand 5729 states and 25585 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:35,116 INFO L93 Difference]: Finished difference Result 6078 states and 26904 transitions. [2021-06-05 05:16:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:16:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:35,131 INFO L225 Difference]: With dead ends: 6078 [2021-06-05 05:16:35,131 INFO L226 Difference]: Without dead ends: 5980 [2021-06-05 05:16:35,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 513.8ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:16:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-06-05 05:16:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 5738. [2021-06-05 05:16:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 4.465225727732264) internal successors, (25617), 5737 states have internal predecessors, (25617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 25617 transitions. [2021-06-05 05:16:35,227 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 25617 transitions. Word has length 30 [2021-06-05 05:16:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:35,227 INFO L482 AbstractCegarLoop]: Abstraction has 5738 states and 25617 transitions. [2021-06-05 05:16:35,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 25617 transitions. [2021-06-05 05:16:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:35,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:35,237 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:35,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:35,441 INFO L430 AbstractCegarLoop]: === Iteration 257 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1582367904, now seen corresponding path program 44 times [2021-06-05 05:16:35,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:35,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811361779] [2021-06-05 05:16:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:35,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:35,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811361779] [2021-06-05 05:16:35,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811361779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:35,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295147523] [2021-06-05 05:16:35,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:35,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:35,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:35,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:35,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:35,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:35,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:35,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 05:16:35,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:35,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:35,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:35,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-06-05 05:16:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:36,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295147523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:36,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:36,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:16:36,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761850868] [2021-06-05 05:16:36,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:36,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:36,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:36,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:36,045 INFO L87 Difference]: Start difference. First operand 5738 states and 25617 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:37,367 INFO L93 Difference]: Finished difference Result 6201 states and 27306 transitions. [2021-06-05 05:16:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:16:37,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:37,380 INFO L225 Difference]: With dead ends: 6201 [2021-06-05 05:16:37,380 INFO L226 Difference]: Without dead ends: 6049 [2021-06-05 05:16:37,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1031.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:16:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6049 states. [2021-06-05 05:16:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6049 to 5729. [2021-06-05 05:16:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5729 states, 5728 states have (on average 4.466305865921788) internal successors, (25583), 5728 states have internal predecessors, (25583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 25583 transitions. [2021-06-05 05:16:37,472 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 25583 transitions. Word has length 30 [2021-06-05 05:16:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:37,472 INFO L482 AbstractCegarLoop]: Abstraction has 5729 states and 25583 transitions. [2021-06-05 05:16:37,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 25583 transitions. [2021-06-05 05:16:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:37,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:37,482 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:37,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:37,683 INFO L430 AbstractCegarLoop]: === Iteration 258 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:37,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:37,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1941336736, now seen corresponding path program 45 times [2021-06-05 05:16:37,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:37,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798795736] [2021-06-05 05:16:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:37,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:37,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798795736] [2021-06-05 05:16:37,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798795736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:37,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974521441] [2021-06-05 05:16:37,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:37,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:16:37,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:37,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:38,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:38,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:38,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:38,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 05:16:38,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:38,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:38,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:38,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-06-05 05:16:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:38,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974521441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:38,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:38,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:16:38,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346270257] [2021-06-05 05:16:38,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:38,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:38,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:38,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:38,202 INFO L87 Difference]: Start difference. First operand 5729 states and 25583 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:38,463 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-06-05 05:16:38,642 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-06-05 05:16:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:39,951 INFO L93 Difference]: Finished difference Result 6459 states and 28255 transitions. [2021-06-05 05:16:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:16:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:39,964 INFO L225 Difference]: With dead ends: 6459 [2021-06-05 05:16:39,964 INFO L226 Difference]: Without dead ends: 6216 [2021-06-05 05:16:39,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1465.6ms TimeCoverageRelationStatistics Valid=409, Invalid=1847, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:16:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6216 states. [2021-06-05 05:16:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6216 to 5732. [2021-06-05 05:16:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5732 states, 5731 states have (on average 4.4660617693247255) internal successors, (25595), 5731 states have internal predecessors, (25595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5732 states to 5732 states and 25595 transitions. [2021-06-05 05:16:40,058 INFO L78 Accepts]: Start accepts. Automaton has 5732 states and 25595 transitions. Word has length 30 [2021-06-05 05:16:40,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:40,058 INFO L482 AbstractCegarLoop]: Abstraction has 5732 states and 25595 transitions. [2021-06-05 05:16:40,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 5732 states and 25595 transitions. [2021-06-05 05:16:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:40,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:40,068 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:40,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 05:16:40,268 INFO L430 AbstractCegarLoop]: === Iteration 259 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:40,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1717163706, now seen corresponding path program 46 times [2021-06-05 05:16:40,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:40,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796450764] [2021-06-05 05:16:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:40,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:40,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796450764] [2021-06-05 05:16:40,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796450764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:40,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415088270] [2021-06-05 05:16:40,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:40,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:40,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:40,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:40,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:40,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:40,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:40,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:40,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:40,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:40,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:16:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:40,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415088270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:40,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:40,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:16:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993421790] [2021-06-05 05:16:40,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:16:40,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:40,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:16:40,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:16:40,668 INFO L87 Difference]: Start difference. First operand 5732 states and 25595 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:41,356 INFO L93 Difference]: Finished difference Result 6207 states and 27408 transitions. [2021-06-05 05:16:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:16:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:41,370 INFO L225 Difference]: With dead ends: 6207 [2021-06-05 05:16:41,370 INFO L226 Difference]: Without dead ends: 6090 [2021-06-05 05:16:41,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:16:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6090 states. [2021-06-05 05:16:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6090 to 5727. [2021-06-05 05:16:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5727 states, 5726 states have (on average 4.466294097100943) internal successors, (25574), 5726 states have internal predecessors, (25574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5727 states to 5727 states and 25574 transitions. [2021-06-05 05:16:41,467 INFO L78 Accepts]: Start accepts. Automaton has 5727 states and 25574 transitions. Word has length 30 [2021-06-05 05:16:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:41,467 INFO L482 AbstractCegarLoop]: Abstraction has 5727 states and 25574 transitions. [2021-06-05 05:16:41,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5727 states and 25574 transitions. [2021-06-05 05:16:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:41,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:41,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:41,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:41,682 INFO L430 AbstractCegarLoop]: === Iteration 260 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash 853148546, now seen corresponding path program 9 times [2021-06-05 05:16:41,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:41,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7144056] [2021-06-05 05:16:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:16:41,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:41,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7144056] [2021-06-05 05:16:41,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7144056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:41,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220396133] [2021-06-05 05:16:41,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:41,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:16:41,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:41,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:41,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:42,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:42,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:42,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:16:42,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:42,052 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 05:16:42,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:42,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 05:16:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:42,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220396133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:42,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:42,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 05:16:42,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596577846] [2021-06-05 05:16:42,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:16:42,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:42,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:16:42,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:16:42,077 INFO L87 Difference]: Start difference. First operand 5727 states and 25574 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:42,671 INFO L93 Difference]: Finished difference Result 6110 states and 26993 transitions. [2021-06-05 05:16:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:16:42,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:42,684 INFO L225 Difference]: With dead ends: 6110 [2021-06-05 05:16:42,685 INFO L226 Difference]: Without dead ends: 6015 [2021-06-05 05:16:42,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2021-06-05 05:16:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 5738. [2021-06-05 05:16:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 4.466620184765557) internal successors, (25625), 5737 states have internal predecessors, (25625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 25625 transitions. [2021-06-05 05:16:42,808 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 25625 transitions. Word has length 30 [2021-06-05 05:16:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:42,808 INFO L482 AbstractCegarLoop]: Abstraction has 5738 states and 25625 transitions. [2021-06-05 05:16:42,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 25625 transitions. [2021-06-05 05:16:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:42,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:42,817 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:43,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:43,018 INFO L430 AbstractCegarLoop]: === Iteration 261 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:43,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:43,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1718803998, now seen corresponding path program 47 times [2021-06-05 05:16:43,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:43,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62360998] [2021-06-05 05:16:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:43,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62360998] [2021-06-05 05:16:43,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62360998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216715837] [2021-06-05 05:16:43,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:43,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:43,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:43,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:43,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 05:16:43,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:43,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:43,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:43,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:36 [2021-06-05 05:16:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:43,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216715837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:43,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:43,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:16:43,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175140564] [2021-06-05 05:16:43,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:43,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:43,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:43,600 INFO L87 Difference]: Start difference. First operand 5738 states and 25625 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:45,039 INFO L93 Difference]: Finished difference Result 6121 states and 27027 transitions. [2021-06-05 05:16:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:16:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:45,056 INFO L225 Difference]: With dead ends: 6121 [2021-06-05 05:16:45,056 INFO L226 Difference]: Without dead ends: 6019 [2021-06-05 05:16:45,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1188.2ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:16:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6019 states. [2021-06-05 05:16:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6019 to 5740. [2021-06-05 05:16:45,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5740 states, 5739 states have (on average 4.466806063774177) internal successors, (25635), 5739 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5740 states to 5740 states and 25635 transitions. [2021-06-05 05:16:45,167 INFO L78 Accepts]: Start accepts. Automaton has 5740 states and 25635 transitions. Word has length 30 [2021-06-05 05:16:45,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:45,168 INFO L482 AbstractCegarLoop]: Abstraction has 5740 states and 25635 transitions. [2021-06-05 05:16:45,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:45,168 INFO L276 IsEmpty]: Start isEmpty. Operand 5740 states and 25635 transitions. [2021-06-05 05:16:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:45,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:45,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:45,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-05 05:16:45,377 INFO L430 AbstractCegarLoop]: === Iteration 262 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1721578654, now seen corresponding path program 48 times [2021-06-05 05:16:45,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:45,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273253028] [2021-06-05 05:16:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:45,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:45,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273253028] [2021-06-05 05:16:45,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273253028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:45,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019766722] [2021-06-05 05:16:45,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:45,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:16:45,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:45,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:45,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:45,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:45,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:45,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:45,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:16:45,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:45,802 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 05:16:45,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:45,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-05 05:16:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:45,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019766722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:45,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:45,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:16:45,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998548423] [2021-06-05 05:16:45,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:45,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:45,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:45,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:45,859 INFO L87 Difference]: Start difference. First operand 5740 states and 25635 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:47,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:47,268 INFO L93 Difference]: Finished difference Result 6420 states and 28190 transitions. [2021-06-05 05:16:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:16:47,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:47,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:47,283 INFO L225 Difference]: With dead ends: 6420 [2021-06-05 05:16:47,283 INFO L226 Difference]: Without dead ends: 6313 [2021-06-05 05:16:47,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1038.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:16:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-06-05 05:16:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 5758. [2021-06-05 05:16:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5758 states, 5757 states have (on average 4.463088414104568) internal successors, (25694), 5757 states have internal predecessors, (25694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5758 states to 5758 states and 25694 transitions. [2021-06-05 05:16:47,381 INFO L78 Accepts]: Start accepts. Automaton has 5758 states and 25694 transitions. Word has length 30 [2021-06-05 05:16:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:47,381 INFO L482 AbstractCegarLoop]: Abstraction has 5758 states and 25694 transitions. [2021-06-05 05:16:47,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:47,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5758 states and 25694 transitions. [2021-06-05 05:16:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:47,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:47,391 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:47,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:47,591 INFO L430 AbstractCegarLoop]: === Iteration 263 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1215232388, now seen corresponding path program 49 times [2021-06-05 05:16:47,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:47,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924490613] [2021-06-05 05:16:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:47,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:47,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924490613] [2021-06-05 05:16:47,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924490613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:47,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010953286] [2021-06-05 05:16:47,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:47,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:47,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:47,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:47,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:16:47,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:47,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:47,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:47,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 05:16:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:48,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010953286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:48,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:48,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:16:48,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455515945] [2021-06-05 05:16:48,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:48,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:48,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:48,040 INFO L87 Difference]: Start difference. First operand 5758 states and 25694 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:49,023 INFO L93 Difference]: Finished difference Result 6348 states and 27971 transitions. [2021-06-05 05:16:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:16:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:49,038 INFO L225 Difference]: With dead ends: 6348 [2021-06-05 05:16:49,038 INFO L226 Difference]: Without dead ends: 6224 [2021-06-05 05:16:49,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 695.3ms TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:16:49,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6224 states. [2021-06-05 05:16:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6224 to 5746. [2021-06-05 05:16:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5746 states, 5745 states have (on average 4.464926022628372) internal successors, (25651), 5745 states have internal predecessors, (25651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5746 states to 5746 states and 25651 transitions. [2021-06-05 05:16:49,137 INFO L78 Accepts]: Start accepts. Automaton has 5746 states and 25651 transitions. Word has length 30 [2021-06-05 05:16:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:49,137 INFO L482 AbstractCegarLoop]: Abstraction has 5746 states and 25651 transitions. [2021-06-05 05:16:49,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5746 states and 25651 transitions. [2021-06-05 05:16:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:49,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:49,147 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:49,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:49,347 INFO L430 AbstractCegarLoop]: === Iteration 264 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash -216230256, now seen corresponding path program 56 times [2021-06-05 05:16:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:49,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481375471] [2021-06-05 05:16:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:49,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:49,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481375471] [2021-06-05 05:16:49,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481375471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:49,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770375059] [2021-06-05 05:16:49,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:49,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:49,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:49,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:49,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:49,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:49,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:49,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:16:49,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:49,778 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-06-05 05:16:49,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:49,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:61 [2021-06-05 05:16:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:49,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770375059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:49,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:49,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:16:49,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52632942] [2021-06-05 05:16:49,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:49,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:49,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:49,899 INFO L87 Difference]: Start difference. First operand 5746 states and 25651 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:52,281 INFO L93 Difference]: Finished difference Result 8399 states and 35866 transitions. [2021-06-05 05:16:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:16:52,281 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:52,298 INFO L225 Difference]: With dead ends: 8399 [2021-06-05 05:16:52,298 INFO L226 Difference]: Without dead ends: 8120 [2021-06-05 05:16:52,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1422.4ms TimeCoverageRelationStatistics Valid=362, Invalid=2500, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:16:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2021-06-05 05:16:52,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 6060. [2021-06-05 05:16:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 4.467073774550256) internal successors, (27066), 6059 states have internal predecessors, (27066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 27066 transitions. [2021-06-05 05:16:52,410 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 27066 transitions. Word has length 30 [2021-06-05 05:16:52,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:52,410 INFO L482 AbstractCegarLoop]: Abstraction has 6060 states and 27066 transitions. [2021-06-05 05:16:52,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 27066 transitions. [2021-06-05 05:16:52,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:52,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:52,419 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:52,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:52,620 INFO L430 AbstractCegarLoop]: === Iteration 265 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash -926529414, now seen corresponding path program 50 times [2021-06-05 05:16:52,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:52,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092609854] [2021-06-05 05:16:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:52,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:52,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092609854] [2021-06-05 05:16:52,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092609854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:52,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524179061] [2021-06-05 05:16:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:52,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:52,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:52,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:52,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:52,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:52,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:16:53,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:53,033 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-06-05 05:16:53,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:53,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:61 [2021-06-05 05:16:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:53,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524179061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:53,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:53,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 05:16:53,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691098848] [2021-06-05 05:16:53,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:16:53,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:53,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:16:53,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:16:53,120 INFO L87 Difference]: Start difference. First operand 6060 states and 27066 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:54,664 INFO L93 Difference]: Finished difference Result 7041 states and 30836 transitions. [2021-06-05 05:16:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:16:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:54,679 INFO L225 Difference]: With dead ends: 7041 [2021-06-05 05:16:54,679 INFO L226 Difference]: Without dead ends: 6926 [2021-06-05 05:16:54,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 846.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:16:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-06-05 05:16:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 6044. [2021-06-05 05:16:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6044 states, 6043 states have (on average 4.467648518947542) internal successors, (26998), 6043 states have internal predecessors, (26998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6044 states to 6044 states and 26998 transitions. [2021-06-05 05:16:54,794 INFO L78 Accepts]: Start accepts. Automaton has 6044 states and 26998 transitions. Word has length 30 [2021-06-05 05:16:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:54,794 INFO L482 AbstractCegarLoop]: Abstraction has 6044 states and 26998 transitions. [2021-06-05 05:16:54,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 6044 states and 26998 transitions. [2021-06-05 05:16:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:54,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:54,804 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:55,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:55,005 INFO L430 AbstractCegarLoop]: === Iteration 266 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:55,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:55,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1191371828, now seen corresponding path program 57 times [2021-06-05 05:16:55,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:55,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032497704] [2021-06-05 05:16:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:55,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:55,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032497704] [2021-06-05 05:16:55,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032497704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:55,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166842784] [2021-06-05 05:16:55,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:55,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:16:55,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:55,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:55,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:55,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:55,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:55,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:16:55,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:55,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:55,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:55,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 05:16:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:55,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166842784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:55,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:55,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:16:55,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575060522] [2021-06-05 05:16:55,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:55,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:55,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:55,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:55,528 INFO L87 Difference]: Start difference. First operand 6044 states and 26998 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:58,238 INFO L93 Difference]: Finished difference Result 7932 states and 34063 transitions. [2021-06-05 05:16:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:16:58,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:58,256 INFO L225 Difference]: With dead ends: 7932 [2021-06-05 05:16:58,256 INFO L226 Difference]: Without dead ends: 7768 [2021-06-05 05:16:58,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1682.1ms TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:16:58,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2021-06-05 05:16:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 6078. [2021-06-05 05:16:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6078 states, 6077 states have (on average 4.464867533322363) internal successors, (27133), 6077 states have internal predecessors, (27133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 27133 transitions. [2021-06-05 05:16:58,379 INFO L78 Accepts]: Start accepts. Automaton has 6078 states and 27133 transitions. Word has length 30 [2021-06-05 05:16:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:58,379 INFO L482 AbstractCegarLoop]: Abstraction has 6078 states and 27133 transitions. [2021-06-05 05:16:58,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6078 states and 27133 transitions. [2021-06-05 05:16:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:58,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:58,389 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:58,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 05:16:58,592 INFO L430 AbstractCegarLoop]: === Iteration 267 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1504898224, now seen corresponding path program 58 times [2021-06-05 05:16:58,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:58,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893581480] [2021-06-05 05:16:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:58,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:58,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893581480] [2021-06-05 05:16:58,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893581480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:58,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998461806] [2021-06-05 05:16:58,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:58,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:58,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:58,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:58,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:58,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:58,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:58,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:16:58,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:58,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:58,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:58,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:16:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:58,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998461806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:58,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:58,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:16:58,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360665848] [2021-06-05 05:16:58,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:16:58,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:58,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:16:58,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:16:58,982 INFO L87 Difference]: Start difference. First operand 6078 states and 27133 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:01,383 INFO L93 Difference]: Finished difference Result 8957 states and 38424 transitions. [2021-06-05 05:17:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:17:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:01,401 INFO L225 Difference]: With dead ends: 8957 [2021-06-05 05:17:01,401 INFO L226 Difference]: Without dead ends: 8810 [2021-06-05 05:17:01,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1620.7ms TimeCoverageRelationStatistics Valid=721, Invalid=3971, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:17:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8810 states. [2021-06-05 05:17:01,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8810 to 6096. [2021-06-05 05:17:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6096 states, 6095 states have (on average 4.461197703035275) internal successors, (27191), 6095 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6096 states to 6096 states and 27191 transitions. [2021-06-05 05:17:01,521 INFO L78 Accepts]: Start accepts. Automaton has 6096 states and 27191 transitions. Word has length 30 [2021-06-05 05:17:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:01,521 INFO L482 AbstractCegarLoop]: Abstraction has 6096 states and 27191 transitions. [2021-06-05 05:17:01,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6096 states and 27191 transitions. [2021-06-05 05:17:01,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:01,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:01,531 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:01,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-05 05:17:01,731 INFO L430 AbstractCegarLoop]: === Iteration 268 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:01,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1930569974, now seen corresponding path program 51 times [2021-06-05 05:17:01,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:01,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268361166] [2021-06-05 05:17:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:01,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:01,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268361166] [2021-06-05 05:17:01,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268361166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:01,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64138243] [2021-06-05 05:17:01,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:01,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:01,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:01,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:02,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:02,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:02,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:17:02,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:02,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:02,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:02,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 05:17:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:02,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64138243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:02,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:02,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 05:17:02,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589505432] [2021-06-05 05:17:02,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:02,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:02,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:02,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:02,221 INFO L87 Difference]: Start difference. First operand 6096 states and 27191 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:04,035 INFO L93 Difference]: Finished difference Result 6664 states and 29340 transitions. [2021-06-05 05:17:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:17:04,035 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:04,050 INFO L225 Difference]: With dead ends: 6664 [2021-06-05 05:17:04,050 INFO L226 Difference]: Without dead ends: 6575 [2021-06-05 05:17:04,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1097.7ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:17:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2021-06-05 05:17:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 6116. [2021-06-05 05:17:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6115 states have (on average 4.4619787408013085) internal successors, (27285), 6115 states have internal predecessors, (27285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 27285 transitions. [2021-06-05 05:17:04,158 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 27285 transitions. Word has length 30 [2021-06-05 05:17:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:04,158 INFO L482 AbstractCegarLoop]: Abstraction has 6116 states and 27285 transitions. [2021-06-05 05:17:04,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 27285 transitions. [2021-06-05 05:17:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:04,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:04,168 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:04,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable636 [2021-06-05 05:17:04,368 INFO L430 AbstractCegarLoop]: === Iteration 269 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash -529343608, now seen corresponding path program 52 times [2021-06-05 05:17:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:04,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503222374] [2021-06-05 05:17:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:04,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:04,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503222374] [2021-06-05 05:17:04,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503222374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:04,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308219018] [2021-06-05 05:17:04,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:04,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:04,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:04,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:04,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:04,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:04,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:04,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:04,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:04,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:04,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:04,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:17:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:04,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308219018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:04,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:04,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:17:04,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256528920] [2021-06-05 05:17:04,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:04,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:04,812 INFO L87 Difference]: Start difference. First operand 6116 states and 27285 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:06,268 INFO L93 Difference]: Finished difference Result 6827 states and 30058 transitions. [2021-06-05 05:17:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:17:06,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:06,283 INFO L225 Difference]: With dead ends: 6827 [2021-06-05 05:17:06,283 INFO L226 Difference]: Without dead ends: 6748 [2021-06-05 05:17:06,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 926.0ms TimeCoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:17:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-06-05 05:17:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6108. [2021-06-05 05:17:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 4.460946454887834) internal successors, (27243), 6107 states have internal predecessors, (27243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 27243 transitions. [2021-06-05 05:17:06,405 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 27243 transitions. Word has length 30 [2021-06-05 05:17:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:06,405 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 27243 transitions. [2021-06-05 05:17:06,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 27243 transitions. [2021-06-05 05:17:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:06,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:06,416 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:06,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 05:17:06,617 INFO L430 AbstractCegarLoop]: === Iteration 270 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:06,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1474284956, now seen corresponding path program 53 times [2021-06-05 05:17:06,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:06,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721493069] [2021-06-05 05:17:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:06,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:06,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721493069] [2021-06-05 05:17:06,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721493069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:06,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182887373] [2021-06-05 05:17:06,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:06,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:06,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:06,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:06,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:06,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:06,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:06,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:06,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:06,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:06,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:17:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:06,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182887373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:06,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:06,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:17:06,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964671182] [2021-06-05 05:17:06,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:06,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:06,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:06,962 INFO L87 Difference]: Start difference. First operand 6108 states and 27243 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:08,392 INFO L93 Difference]: Finished difference Result 8391 states and 35817 transitions. [2021-06-05 05:17:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:17:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:08,410 INFO L225 Difference]: With dead ends: 8391 [2021-06-05 05:17:08,410 INFO L226 Difference]: Without dead ends: 8248 [2021-06-05 05:17:08,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:17:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-06-05 05:17:08,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 6108. [2021-06-05 05:17:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 4.460291468806288) internal successors, (27239), 6107 states have internal predecessors, (27239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 27239 transitions. [2021-06-05 05:17:08,530 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 27239 transitions. Word has length 30 [2021-06-05 05:17:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:08,530 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 27239 transitions. [2021-06-05 05:17:08,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 27239 transitions. [2021-06-05 05:17:08,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:08,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:08,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:08,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 05:17:08,745 INFO L430 AbstractCegarLoop]: === Iteration 271 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1322558186, now seen corresponding path program 59 times [2021-06-05 05:17:08,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:08,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347309244] [2021-06-05 05:17:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:08,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:08,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347309244] [2021-06-05 05:17:08,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347309244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:08,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225159929] [2021-06-05 05:17:08,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:08,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:17:08,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:09,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:09,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:09,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:09,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 05:17:09,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:09,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:09,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:09,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 05:17:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:09,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225159929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:09,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:09,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:17:09,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124983274] [2021-06-05 05:17:09,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:09,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:09,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:09,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:09,146 INFO L87 Difference]: Start difference. First operand 6108 states and 27239 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:10,254 INFO L93 Difference]: Finished difference Result 7064 states and 30882 transitions. [2021-06-05 05:17:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:17:10,255 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:10,274 INFO L225 Difference]: With dead ends: 7064 [2021-06-05 05:17:10,274 INFO L226 Difference]: Without dead ends: 6990 [2021-06-05 05:17:10,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2021-06-05 05:17:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 6134. [2021-06-05 05:17:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6134 states, 6133 states have (on average 4.458666231860427) internal successors, (27345), 6133 states have internal predecessors, (27345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6134 states to 6134 states and 27345 transitions. [2021-06-05 05:17:10,386 INFO L78 Accepts]: Start accepts. Automaton has 6134 states and 27345 transitions. Word has length 30 [2021-06-05 05:17:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:10,386 INFO L482 AbstractCegarLoop]: Abstraction has 6134 states and 27345 transitions. [2021-06-05 05:17:10,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 6134 states and 27345 transitions. [2021-06-05 05:17:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:10,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:10,396 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:10,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:10,596 INFO L430 AbstractCegarLoop]: === Iteration 272 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash 612259028, now seen corresponding path program 54 times [2021-06-05 05:17:10,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:10,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030289503] [2021-06-05 05:17:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:10,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:10,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030289503] [2021-06-05 05:17:10,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030289503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:10,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312104014] [2021-06-05 05:17:10,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:10,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:10,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:10,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:10,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:11,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:11,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:11,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:17:11,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:17:11,047 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-06-05 05:17:11,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:11,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:61 [2021-06-05 05:17:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:11,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312104014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:11,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:11,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 05:17:11,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982810578] [2021-06-05 05:17:11,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:11,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:11,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:11,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:11,132 INFO L87 Difference]: Start difference. First operand 6134 states and 27345 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:12,584 INFO L93 Difference]: Finished difference Result 7237 states and 31521 transitions. [2021-06-05 05:17:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:17:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:12,600 INFO L225 Difference]: With dead ends: 7237 [2021-06-05 05:17:12,600 INFO L226 Difference]: Without dead ends: 7122 [2021-06-05 05:17:12,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 978.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:17:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2021-06-05 05:17:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 6116. [2021-06-05 05:17:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6115 states have (on average 4.459689288634506) internal successors, (27271), 6115 states have internal predecessors, (27271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 27271 transitions. [2021-06-05 05:17:12,710 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 27271 transitions. Word has length 30 [2021-06-05 05:17:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:12,710 INFO L482 AbstractCegarLoop]: Abstraction has 6116 states and 27271 transitions. [2021-06-05 05:17:12,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 27271 transitions. [2021-06-05 05:17:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:12,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:12,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:12,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-06-05 05:17:12,920 INFO L430 AbstractCegarLoop]: === Iteration 273 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1832674602, now seen corresponding path program 60 times [2021-06-05 05:17:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:12,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991328288] [2021-06-05 05:17:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:13,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:13,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991328288] [2021-06-05 05:17:13,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991328288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:13,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727478285] [2021-06-05 05:17:13,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:13,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:17:13,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:13,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:13,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:13,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:13,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:13,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:13,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:13,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:17:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:13,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727478285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:13,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:13,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 05:17:13,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611942209] [2021-06-05 05:17:13,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:13,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:13,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:13,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:13,296 INFO L87 Difference]: Start difference. First operand 6116 states and 27271 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:14,287 INFO L93 Difference]: Finished difference Result 6828 states and 30008 transitions. [2021-06-05 05:17:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:17:14,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:14,303 INFO L225 Difference]: With dead ends: 6828 [2021-06-05 05:17:14,303 INFO L226 Difference]: Without dead ends: 6755 [2021-06-05 05:17:14,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 589.4ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-06-05 05:17:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6124. [2021-06-05 05:17:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6124 states, 6123 states have (on average 4.458762044749306) internal successors, (27301), 6123 states have internal predecessors, (27301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 27301 transitions. [2021-06-05 05:17:14,424 INFO L78 Accepts]: Start accepts. Automaton has 6124 states and 27301 transitions. Word has length 30 [2021-06-05 05:17:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:14,424 INFO L482 AbstractCegarLoop]: Abstraction has 6124 states and 27301 transitions. [2021-06-05 05:17:14,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6124 states and 27301 transitions. [2021-06-05 05:17:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:14,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:14,435 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:14,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 05:17:14,636 INFO L430 AbstractCegarLoop]: === Iteration 274 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:14,636 INFO L82 PathProgramCache]: Analyzing trace with hash 849814126, now seen corresponding path program 61 times [2021-06-05 05:17:14,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:14,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685596552] [2021-06-05 05:17:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:14,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685596552] [2021-06-05 05:17:14,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685596552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:14,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438709840] [2021-06-05 05:17:14,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:14,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:14,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:15,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:15,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:15,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:15,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:15,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:15,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:15,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:15,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:17:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:15,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438709840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:15,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:15,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 05:17:15,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722473335] [2021-06-05 05:17:15,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:15,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:15,109 INFO L87 Difference]: Start difference. First operand 6124 states and 27301 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:16,102 INFO L93 Difference]: Finished difference Result 6823 states and 29985 transitions. [2021-06-05 05:17:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:17:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:16,118 INFO L225 Difference]: With dead ends: 6823 [2021-06-05 05:17:16,118 INFO L226 Difference]: Without dead ends: 6748 [2021-06-05 05:17:16,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 657.2ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-06-05 05:17:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6119. [2021-06-05 05:17:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 6118 states have (on average 4.459790781301079) internal successors, (27285), 6118 states have internal predecessors, (27285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 27285 transitions. [2021-06-05 05:17:16,233 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 27285 transitions. Word has length 30 [2021-06-05 05:17:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:16,233 INFO L482 AbstractCegarLoop]: Abstraction has 6119 states and 27285 transitions. [2021-06-05 05:17:16,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 27285 transitions. [2021-06-05 05:17:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:16,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:16,247 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:16,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 05:17:16,448 INFO L430 AbstractCegarLoop]: === Iteration 275 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:16,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:16,448 INFO L82 PathProgramCache]: Analyzing trace with hash -7297126, now seen corresponding path program 55 times [2021-06-05 05:17:16,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:16,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554562602] [2021-06-05 05:17:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:16,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554562602] [2021-06-05 05:17:16,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554562602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977700364] [2021-06-05 05:17:16,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:16,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:16,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:16,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:16,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:16,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:16,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:16,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:16,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:17:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:16,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977700364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:16,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:16,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 05:17:16,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224513002] [2021-06-05 05:17:16,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:17:16,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:16,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:17:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:17:16,805 INFO L87 Difference]: Start difference. First operand 6119 states and 27285 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:18,972 INFO L93 Difference]: Finished difference Result 8811 states and 37531 transitions. [2021-06-05 05:17:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:17:18,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:18,991 INFO L225 Difference]: With dead ends: 8811 [2021-06-05 05:17:18,991 INFO L226 Difference]: Without dead ends: 8663 [2021-06-05 05:17:18,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1226.6ms TimeCoverageRelationStatistics Valid=463, Invalid=2293, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:17:19,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2021-06-05 05:17:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 6142. [2021-06-05 05:17:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 4.4583943983064644) internal successors, (27379), 6141 states have internal predecessors, (27379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 27379 transitions. [2021-06-05 05:17:19,114 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 27379 transitions. Word has length 30 [2021-06-05 05:17:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:19,114 INFO L482 AbstractCegarLoop]: Abstraction has 6142 states and 27379 transitions. [2021-06-05 05:17:19,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 27379 transitions. [2021-06-05 05:17:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:19,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:19,124 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:19,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 05:17:19,324 INFO L430 AbstractCegarLoop]: === Iteration 276 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1758731406, now seen corresponding path program 56 times [2021-06-05 05:17:19,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:19,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327409464] [2021-06-05 05:17:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:19,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:19,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327409464] [2021-06-05 05:17:19,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327409464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:19,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773813305] [2021-06-05 05:17:19,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:19,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:19,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:19,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:19,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:19,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:19,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:19,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:17:19,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:19,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:19,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:19,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 05:17:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:19,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773813305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:19,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:19,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:17:19,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776047649] [2021-06-05 05:17:19,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:19,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:19,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:19,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:19,735 INFO L87 Difference]: Start difference. First operand 6142 states and 27379 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:22,107 INFO L93 Difference]: Finished difference Result 9223 states and 39019 transitions. [2021-06-05 05:17:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:17:22,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:22,126 INFO L225 Difference]: With dead ends: 9223 [2021-06-05 05:17:22,126 INFO L226 Difference]: Without dead ends: 9081 [2021-06-05 05:17:22,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1440.1ms TimeCoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:17:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9081 states. [2021-06-05 05:17:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9081 to 6132. [2021-06-05 05:17:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 4.458326537269613) internal successors, (27334), 6131 states have internal predecessors, (27334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 27334 transitions. [2021-06-05 05:17:22,255 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 27334 transitions. Word has length 30 [2021-06-05 05:17:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:22,255 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 27334 transitions. [2021-06-05 05:17:22,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 27334 transitions. [2021-06-05 05:17:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:22,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:22,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:22,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 05:17:22,465 INFO L430 AbstractCegarLoop]: === Iteration 277 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:22,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1275770602, now seen corresponding path program 62 times [2021-06-05 05:17:22,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:22,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433497464] [2021-06-05 05:17:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:22,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:22,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433497464] [2021-06-05 05:17:22,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433497464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:22,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604366840] [2021-06-05 05:17:22,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:22,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:22,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:22,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:22,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:22,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:22,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:17:22,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:22,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:22,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:22,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 05:17:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:23,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604366840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:23,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:23,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:17:23,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825882605] [2021-06-05 05:17:23,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:23,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:23,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:23,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:23,003 INFO L87 Difference]: Start difference. First operand 6132 states and 27334 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:25,861 INFO L93 Difference]: Finished difference Result 7499 states and 32440 transitions. [2021-06-05 05:17:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:17:25,862 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:25,878 INFO L225 Difference]: With dead ends: 7499 [2021-06-05 05:17:25,878 INFO L226 Difference]: Without dead ends: 7343 [2021-06-05 05:17:25,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1868.1ms TimeCoverageRelationStatistics Valid=350, Invalid=2842, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:17:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2021-06-05 05:17:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 6154. [2021-06-05 05:17:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6154 states, 6153 states have (on average 4.457012839265399) internal successors, (27424), 6153 states have internal predecessors, (27424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 27424 transitions. [2021-06-05 05:17:25,993 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 27424 transitions. Word has length 30 [2021-06-05 05:17:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:25,993 INFO L482 AbstractCegarLoop]: Abstraction has 6154 states and 27424 transitions. [2021-06-05 05:17:25,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 27424 transitions. [2021-06-05 05:17:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:26,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:26,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:26,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-06-05 05:17:26,204 INFO L430 AbstractCegarLoop]: === Iteration 278 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:26,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:26,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1589296998, now seen corresponding path program 63 times [2021-06-05 05:17:26,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:26,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399365001] [2021-06-05 05:17:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:26,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:26,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399365001] [2021-06-05 05:17:26,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399365001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:26,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414385701] [2021-06-05 05:17:26,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:26,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:26,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:26,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:26,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:26,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:26,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:17:26,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:26,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:26,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:26,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 05:17:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:26,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414385701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:26,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:26,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:17:26,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482009219] [2021-06-05 05:17:26,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:26,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:26,725 INFO L87 Difference]: Start difference. First operand 6154 states and 27424 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:29,743 INFO L93 Difference]: Finished difference Result 7689 states and 33388 transitions. [2021-06-05 05:17:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:17:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:29,759 INFO L225 Difference]: With dead ends: 7689 [2021-06-05 05:17:29,759 INFO L226 Difference]: Without dead ends: 7493 [2021-06-05 05:17:29,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2243.0ms TimeCoverageRelationStatistics Valid=498, Invalid=3662, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:17:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7493 states. [2021-06-05 05:17:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7493 to 6150. [2021-06-05 05:17:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6150 states, 6149 states have (on average 4.457635387867946) internal successors, (27410), 6149 states have internal predecessors, (27410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6150 states to 6150 states and 27410 transitions. [2021-06-05 05:17:29,873 INFO L78 Accepts]: Start accepts. Automaton has 6150 states and 27410 transitions. Word has length 30 [2021-06-05 05:17:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:29,873 INFO L482 AbstractCegarLoop]: Abstraction has 6150 states and 27410 transitions. [2021-06-05 05:17:29,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6150 states and 27410 transitions. [2021-06-05 05:17:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:29,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:29,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:30,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 05:17:30,084 INFO L430 AbstractCegarLoop]: === Iteration 279 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:30,084 INFO L82 PathProgramCache]: Analyzing trace with hash 20793724, now seen corresponding path program 64 times [2021-06-05 05:17:30,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:30,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582706845] [2021-06-05 05:17:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:30,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:30,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582706845] [2021-06-05 05:17:30,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582706845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:30,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326149434] [2021-06-05 05:17:30,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:30,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:30,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:30,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:30,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:30,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:30,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:30,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:30,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:30,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:30,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:17:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:30,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326149434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:30,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:30,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:17:30,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336902012] [2021-06-05 05:17:30,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:30,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:30,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:30,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:30,515 INFO L87 Difference]: Start difference. First operand 6150 states and 27410 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:31,735 INFO L93 Difference]: Finished difference Result 6822 states and 30013 transitions. [2021-06-05 05:17:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:17:31,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:31,750 INFO L225 Difference]: With dead ends: 6822 [2021-06-05 05:17:31,750 INFO L226 Difference]: Without dead ends: 6749 [2021-06-05 05:17:31,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 859.7ms TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:17:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6749 states. [2021-06-05 05:17:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6749 to 6148. [2021-06-05 05:17:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 4.455994794208557) internal successors, (27391), 6147 states have internal predecessors, (27391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 27391 transitions. [2021-06-05 05:17:31,892 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 27391 transitions. Word has length 30 [2021-06-05 05:17:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:31,892 INFO L482 AbstractCegarLoop]: Abstraction has 6148 states and 27391 transitions. [2021-06-05 05:17:31,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 27391 transitions. [2021-06-05 05:17:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:31,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:31,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:32,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:32,103 INFO L430 AbstractCegarLoop]: === Iteration 280 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:32,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:32,104 INFO L82 PathProgramCache]: Analyzing trace with hash 685196466, now seen corresponding path program 65 times [2021-06-05 05:17:32,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:32,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827741775] [2021-06-05 05:17:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:32,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:32,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827741775] [2021-06-05 05:17:32,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827741775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:32,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887065326] [2021-06-05 05:17:32,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:32,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:17:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:32,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:32,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:32,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:32,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:32,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 05:17:32,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:32,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:32,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:32,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:123 [2021-06-05 05:17:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:32,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887065326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:32,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:32,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 05:17:32,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063068026] [2021-06-05 05:17:32,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:32,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:32,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:32,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:32,620 INFO L87 Difference]: Start difference. First operand 6148 states and 27391 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:33,926 INFO L93 Difference]: Finished difference Result 7068 states and 31105 transitions. [2021-06-05 05:17:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:17:33,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:33,943 INFO L225 Difference]: With dead ends: 7068 [2021-06-05 05:17:33,943 INFO L226 Difference]: Without dead ends: 7010 [2021-06-05 05:17:33,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 908.5ms TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:17:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7010 states. [2021-06-05 05:17:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7010 to 6148. [2021-06-05 05:17:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 4.45566943224337) internal successors, (27389), 6147 states have internal predecessors, (27389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 27389 transitions. [2021-06-05 05:17:34,049 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 27389 transitions. Word has length 30 [2021-06-05 05:17:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:34,050 INFO L482 AbstractCegarLoop]: Abstraction has 6148 states and 27389 transitions. [2021-06-05 05:17:34,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 27389 transitions. [2021-06-05 05:17:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:34,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:34,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:34,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 05:17:34,261 INFO L430 AbstractCegarLoop]: === Iteration 281 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2052023334, now seen corresponding path program 66 times [2021-06-05 05:17:34,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:34,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724295023] [2021-06-05 05:17:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:34,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:34,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724295023] [2021-06-05 05:17:34,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724295023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:34,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571747569] [2021-06-05 05:17:34,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:34,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:34,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:34,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:17:34,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:34,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:34,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:34,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:34,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:17:34,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:34,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:34,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:34,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 05:17:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:34,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571747569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:34,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:34,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:17:34,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162023958] [2021-06-05 05:17:34,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:34,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:34,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:34,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:34,834 INFO L87 Difference]: Start difference. First operand 6148 states and 27389 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:37,818 INFO L93 Difference]: Finished difference Result 7306 states and 32083 transitions. [2021-06-05 05:17:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:17:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:37,834 INFO L225 Difference]: With dead ends: 7306 [2021-06-05 05:17:37,834 INFO L226 Difference]: Without dead ends: 7225 [2021-06-05 05:17:37,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 2415.0ms TimeCoverageRelationStatistics Valid=717, Invalid=4395, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:17:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7225 states. [2021-06-05 05:17:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7225 to 6147. [2021-06-05 05:17:37,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6147 states, 6146 states have (on average 4.455906280507647) internal successors, (27386), 6146 states have internal predecessors, (27386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 27386 transitions. [2021-06-05 05:17:37,946 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 27386 transitions. Word has length 30 [2021-06-05 05:17:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:37,946 INFO L482 AbstractCegarLoop]: Abstraction has 6147 states and 27386 transitions. [2021-06-05 05:17:37,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 27386 transitions. [2021-06-05 05:17:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:37,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:37,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:38,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable673,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:38,157 INFO L430 AbstractCegarLoop]: === Iteration 282 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash -698006990, now seen corresponding path program 67 times [2021-06-05 05:17:38,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:38,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982343264] [2021-06-05 05:17:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:38,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:38,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982343264] [2021-06-05 05:17:38,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982343264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:38,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249056392] [2021-06-05 05:17:38,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:38,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:38,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:38,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:38,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:38,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:38,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:38,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:38,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:38,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:17:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:38,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249056392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:38,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:38,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:17:38,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702454206] [2021-06-05 05:17:38,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:38,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:38,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:38,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:38,562 INFO L87 Difference]: Start difference. First operand 6147 states and 27386 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:41,665 INFO L93 Difference]: Finished difference Result 8629 states and 37333 transitions. [2021-06-05 05:17:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:17:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:41,684 INFO L225 Difference]: With dead ends: 8629 [2021-06-05 05:17:41,684 INFO L226 Difference]: Without dead ends: 8516 [2021-06-05 05:17:41,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 2464.8ms TimeCoverageRelationStatistics Valid=858, Invalid=5148, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:17:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8516 states. [2021-06-05 05:17:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8516 to 6169. [2021-06-05 05:17:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 6168 states have (on average 4.454604409857328) internal successors, (27476), 6168 states have internal predecessors, (27476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 27476 transitions. [2021-06-05 05:17:41,804 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 27476 transitions. Word has length 30 [2021-06-05 05:17:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:41,804 INFO L482 AbstractCegarLoop]: Abstraction has 6169 states and 27476 transitions. [2021-06-05 05:17:41,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 27476 transitions. [2021-06-05 05:17:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:41,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:41,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:42,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-06-05 05:17:42,014 INFO L430 AbstractCegarLoop]: === Iteration 283 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:42,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:42,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1837669644, now seen corresponding path program 68 times [2021-06-05 05:17:42,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:42,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789989052] [2021-06-05 05:17:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:42,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:42,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789989052] [2021-06-05 05:17:42,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789989052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:42,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767991280] [2021-06-05 05:17:42,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:42,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:42,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:42,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:42,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:42,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:17:42,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:42,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:42,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:42,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 05:17:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:42,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767991280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:42,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:42,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:17:42,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424528121] [2021-06-05 05:17:42,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:42,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:42,664 INFO L87 Difference]: Start difference. First operand 6169 states and 27476 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:44,461 INFO L93 Difference]: Finished difference Result 6941 states and 30277 transitions. [2021-06-05 05:17:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:17:44,461 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:44,476 INFO L225 Difference]: With dead ends: 6941 [2021-06-05 05:17:44,476 INFO L226 Difference]: Without dead ends: 6779 [2021-06-05 05:17:44,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1383.0ms TimeCoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:17:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-06-05 05:17:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6160. [2021-06-05 05:17:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 4.455431076473453) internal successors, (27441), 6159 states have internal predecessors, (27441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 27441 transitions. [2021-06-05 05:17:44,589 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 27441 transitions. Word has length 30 [2021-06-05 05:17:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:44,589 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 27441 transitions. [2021-06-05 05:17:44,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 27441 transitions. [2021-06-05 05:17:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:44,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:44,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:44,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:44,800 INFO L430 AbstractCegarLoop]: === Iteration 284 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:44,800 INFO L82 PathProgramCache]: Analyzing trace with hash -910007654, now seen corresponding path program 57 times [2021-06-05 05:17:44,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:44,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843941365] [2021-06-05 05:17:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:44,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:44,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843941365] [2021-06-05 05:17:44,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843941365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:44,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900090883] [2021-06-05 05:17:44,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:45,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:45,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:45,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:45,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:45,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:45,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:17:45,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:45,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:45,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:45,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 05:17:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:45,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900090883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:45,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:45,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 05:17:45,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891745972] [2021-06-05 05:17:45,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:45,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:45,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:45,332 INFO L87 Difference]: Start difference. First operand 6160 states and 27441 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:46,838 INFO L93 Difference]: Finished difference Result 6629 states and 29196 transitions. [2021-06-05 05:17:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:46,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:46,852 INFO L225 Difference]: With dead ends: 6629 [2021-06-05 05:17:46,852 INFO L226 Difference]: Without dead ends: 6540 [2021-06-05 05:17:46,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1100.8ms TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:17:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6540 states. [2021-06-05 05:17:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6540 to 6186. [2021-06-05 05:17:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 4.454324979789814) internal successors, (27550), 6185 states have internal predecessors, (27550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 27550 transitions. [2021-06-05 05:17:46,958 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 27550 transitions. Word has length 30 [2021-06-05 05:17:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:46,958 INFO L482 AbstractCegarLoop]: Abstraction has 6186 states and 27550 transitions. [2021-06-05 05:17:46,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 27550 transitions. [2021-06-05 05:17:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:46,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:46,969 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:47,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-05 05:17:47,169 INFO L430 AbstractCegarLoop]: === Iteration 285 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash 925046060, now seen corresponding path program 58 times [2021-06-05 05:17:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:47,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567399413] [2021-06-05 05:17:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:47,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:47,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567399413] [2021-06-05 05:17:47,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567399413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:47,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892381339] [2021-06-05 05:17:47,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:47,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:47,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:47,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:47,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:47,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:47,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:47,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:47,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:47,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:47,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:47,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:17:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:47,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892381339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:47,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:47,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:17:47,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491012656] [2021-06-05 05:17:47,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:47,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:47,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:47,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:47,624 INFO L87 Difference]: Start difference. First operand 6186 states and 27550 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:49,138 INFO L93 Difference]: Finished difference Result 6821 states and 30008 transitions. [2021-06-05 05:17:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:17:49,138 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:49,153 INFO L225 Difference]: With dead ends: 6821 [2021-06-05 05:17:49,153 INFO L226 Difference]: Without dead ends: 6742 [2021-06-05 05:17:49,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1014.8ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:17:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2021-06-05 05:17:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 6176. [2021-06-05 05:17:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6176 states, 6175 states have (on average 4.4550607287449395) internal successors, (27510), 6175 states have internal predecessors, (27510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 27510 transitions. [2021-06-05 05:17:49,324 INFO L78 Accepts]: Start accepts. Automaton has 6176 states and 27510 transitions. Word has length 30 [2021-06-05 05:17:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:49,324 INFO L482 AbstractCegarLoop]: Abstraction has 6176 states and 27510 transitions. [2021-06-05 05:17:49,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 6176 states and 27510 transitions. [2021-06-05 05:17:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:49,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:49,335 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:49,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 05:17:49,536 INFO L430 AbstractCegarLoop]: === Iteration 286 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:49,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1366292672, now seen corresponding path program 59 times [2021-06-05 05:17:49,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:49,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945248946] [2021-06-05 05:17:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:49,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:49,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945248946] [2021-06-05 05:17:49,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945248946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:49,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027714888] [2021-06-05 05:17:49,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:49,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:49,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:49,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:49,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:49,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:49,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:49,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:49,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:49,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:49,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:17:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:49,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027714888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:49,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:49,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:17:49,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834307642] [2021-06-05 05:17:49,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:49,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:49,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:49,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:49,893 INFO L87 Difference]: Start difference. First operand 6176 states and 27510 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:51,265 INFO L93 Difference]: Finished difference Result 7622 states and 33107 transitions. [2021-06-05 05:17:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:17:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:51,281 INFO L225 Difference]: With dead ends: 7622 [2021-06-05 05:17:51,282 INFO L226 Difference]: Without dead ends: 7543 [2021-06-05 05:17:51,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:17:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7543 states. [2021-06-05 05:17:51,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7543 to 6181. [2021-06-05 05:17:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 4.454368932038835) internal successors, (27528), 6180 states have internal predecessors, (27528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 27528 transitions. [2021-06-05 05:17:51,397 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 27528 transitions. Word has length 30 [2021-06-05 05:17:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:51,397 INFO L482 AbstractCegarLoop]: Abstraction has 6181 states and 27528 transitions. [2021-06-05 05:17:51,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 27528 transitions. [2021-06-05 05:17:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:51,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:51,408 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:51,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:51,608 INFO L430 AbstractCegarLoop]: === Iteration 287 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash 386556672, now seen corresponding path program 60 times [2021-06-05 05:17:51,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:51,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115540715] [2021-06-05 05:17:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:51,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:51,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115540715] [2021-06-05 05:17:51,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115540715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:51,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836589751] [2021-06-05 05:17:51,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:51,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:51,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:51,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:51,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:51,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:51,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:17:51,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:51,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:51,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:51,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 05:17:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:52,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836589751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:52,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:52,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:17:52,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623848668] [2021-06-05 05:17:52,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:52,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:52,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:52,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:52,116 INFO L87 Difference]: Start difference. First operand 6181 states and 27528 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:54,211 INFO L93 Difference]: Finished difference Result 7514 states and 32843 transitions. [2021-06-05 05:17:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:17:54,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:54,227 INFO L225 Difference]: With dead ends: 7514 [2021-06-05 05:17:54,227 INFO L226 Difference]: Without dead ends: 7425 [2021-06-05 05:17:54,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1601.6ms TimeCoverageRelationStatistics Valid=432, Invalid=2990, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:17:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7425 states. [2021-06-05 05:17:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7425 to 6191. [2021-06-05 05:17:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6191 states, 6190 states have (on average 4.452665589660743) internal successors, (27562), 6190 states have internal predecessors, (27562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6191 states to 6191 states and 27562 transitions. [2021-06-05 05:17:54,339 INFO L78 Accepts]: Start accepts. Automaton has 6191 states and 27562 transitions. Word has length 30 [2021-06-05 05:17:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:54,339 INFO L482 AbstractCegarLoop]: Abstraction has 6191 states and 27562 transitions. [2021-06-05 05:17:54,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states and 27562 transitions. [2021-06-05 05:17:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:54,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:54,349 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:54,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:54,550 INFO L430 AbstractCegarLoop]: === Iteration 288 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:54,550 INFO L82 PathProgramCache]: Analyzing trace with hash 774116114, now seen corresponding path program 61 times [2021-06-05 05:17:54,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:54,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338575600] [2021-06-05 05:17:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:54,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:54,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338575600] [2021-06-05 05:17:54,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338575600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:54,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113599302] [2021-06-05 05:17:54,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:54,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:54,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:54,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:54,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:54,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:17:54,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:54,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:54,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:54,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:17:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:54,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113599302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:54,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:54,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:17:54,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972917458] [2021-06-05 05:17:54,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:54,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:54,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:54,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:54,930 INFO L87 Difference]: Start difference. First operand 6191 states and 27562 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:56,486 INFO L93 Difference]: Finished difference Result 7645 states and 33130 transitions. [2021-06-05 05:17:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:17:56,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:56,502 INFO L225 Difference]: With dead ends: 7645 [2021-06-05 05:17:56,502 INFO L226 Difference]: Without dead ends: 7570 [2021-06-05 05:17:56,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1041.4ms TimeCoverageRelationStatistics Valid=363, Invalid=1707, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:17:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7570 states. [2021-06-05 05:17:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7570 to 6189. [2021-06-05 05:17:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6189 states, 6188 states have (on average 4.453458306399483) internal successors, (27558), 6188 states have internal predecessors, (27558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 27558 transitions. [2021-06-05 05:17:56,617 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 27558 transitions. Word has length 30 [2021-06-05 05:17:56,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:56,617 INFO L482 AbstractCegarLoop]: Abstraction has 6189 states and 27558 transitions. [2021-06-05 05:17:56,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 27558 transitions. [2021-06-05 05:17:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:56,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:56,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:56,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable696,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:56,827 INFO L430 AbstractCegarLoop]: === Iteration 289 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash 134499218, now seen corresponding path program 62 times [2021-06-05 05:17:56,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:56,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618473857] [2021-06-05 05:17:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:56,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:56,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618473857] [2021-06-05 05:17:56,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618473857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:56,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232598084] [2021-06-05 05:17:56,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:57,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:57,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:57,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:57,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:57,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:57,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:17:57,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:57,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 05:17:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:57,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232598084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:57,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:57,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:17:57,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067104994] [2021-06-05 05:17:57,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:17:57,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:57,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:17:57,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:17:57,251 INFO L87 Difference]: Start difference. First operand 6189 states and 27558 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:58,619 INFO L93 Difference]: Finished difference Result 7210 states and 31489 transitions. [2021-06-05 05:17:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:17:58,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:58,635 INFO L225 Difference]: With dead ends: 7210 [2021-06-05 05:17:58,635 INFO L226 Difference]: Without dead ends: 7144 [2021-06-05 05:17:58,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1059.2ms TimeCoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:17:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-06-05 05:17:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 6187. [2021-06-05 05:17:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6187 states, 6186 states have (on average 4.45328160362108) internal successors, (27548), 6186 states have internal predecessors, (27548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 27548 transitions. [2021-06-05 05:17:58,754 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 27548 transitions. Word has length 30 [2021-06-05 05:17:58,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:58,754 INFO L482 AbstractCegarLoop]: Abstraction has 6187 states and 27548 transitions. [2021-06-05 05:17:58,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 27548 transitions. [2021-06-05 05:17:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:58,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:58,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:58,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 05:17:58,966 INFO L430 AbstractCegarLoop]: === Iteration 290 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2015091668, now seen corresponding path program 63 times [2021-06-05 05:17:58,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:58,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339676780] [2021-06-05 05:17:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:59,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:59,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339676780] [2021-06-05 05:17:59,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339676780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:59,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721395824] [2021-06-05 05:17:59,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:59,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:59,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:59,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:59,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:59,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:59,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:59,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:17:59,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:59,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:59,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:59,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 05:17:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:59,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721395824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:59,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:59,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:17:59,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798117457] [2021-06-05 05:17:59,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:59,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:59,474 INFO L87 Difference]: Start difference. First operand 6187 states and 27548 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:01,633 INFO L93 Difference]: Finished difference Result 7679 states and 33223 transitions. [2021-06-05 05:18:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:18:01,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:01,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:01,650 INFO L225 Difference]: With dead ends: 7679 [2021-06-05 05:18:01,650 INFO L226 Difference]: Without dead ends: 7537 [2021-06-05 05:18:01,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1666.5ms TimeCoverageRelationStatistics Valid=444, Invalid=2526, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:18:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7537 states. [2021-06-05 05:18:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7537 to 6184. [2021-06-05 05:18:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6183 states have (on average 4.453986737829533) internal successors, (27539), 6183 states have internal predecessors, (27539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 27539 transitions. [2021-06-05 05:18:01,763 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 27539 transitions. Word has length 30 [2021-06-05 05:18:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:01,763 INFO L482 AbstractCegarLoop]: Abstraction has 6184 states and 27539 transitions. [2021-06-05 05:18:01,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 27539 transitions. [2021-06-05 05:18:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:01,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:01,773 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:01,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-05 05:18:01,974 INFO L430 AbstractCegarLoop]: === Iteration 291 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:01,974 INFO L82 PathProgramCache]: Analyzing trace with hash -417734958, now seen corresponding path program 64 times [2021-06-05 05:18:01,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:01,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181110852] [2021-06-05 05:18:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:02,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:02,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181110852] [2021-06-05 05:18:02,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181110852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:02,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78929152] [2021-06-05 05:18:02,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:02,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:02,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:02,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:02,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:02,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:02,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:02,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:18:02,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:02,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:02,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:02,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:18:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:02,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78929152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:02,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:02,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:02,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698226205] [2021-06-05 05:18:02,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:02,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:02,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:02,404 INFO L87 Difference]: Start difference. First operand 6184 states and 27539 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:04,727 INFO L93 Difference]: Finished difference Result 8478 states and 36592 transitions. [2021-06-05 05:18:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:18:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:04,746 INFO L225 Difference]: With dead ends: 8478 [2021-06-05 05:18:04,747 INFO L226 Difference]: Without dead ends: 8379 [2021-06-05 05:18:04,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1633.3ms TimeCoverageRelationStatistics Valid=808, Invalid=4162, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:18:04,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8379 states. [2021-06-05 05:18:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8379 to 6193. [2021-06-05 05:18:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6193 states, 6192 states have (on average 4.452519379844961) internal successors, (27570), 6192 states have internal predecessors, (27570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6193 states to 6193 states and 27570 transitions. [2021-06-05 05:18:04,880 INFO L78 Accepts]: Start accepts. Automaton has 6193 states and 27570 transitions. Word has length 30 [2021-06-05 05:18:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:04,880 INFO L482 AbstractCegarLoop]: Abstraction has 6193 states and 27570 transitions. [2021-06-05 05:18:04,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6193 states and 27570 transitions. [2021-06-05 05:18:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:04,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:04,892 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:05,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:05,092 INFO L430 AbstractCegarLoop]: === Iteration 292 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1054201812, now seen corresponding path program 65 times [2021-06-05 05:18:05,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:05,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911236055] [2021-06-05 05:18:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:05,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:05,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911236055] [2021-06-05 05:18:05,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911236055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:05,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643388395] [2021-06-05 05:18:05,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:05,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:05,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:05,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:05,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:18:05,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:05,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:05,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:05,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:18:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:05,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643388395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:05,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:05,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:05,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795555345] [2021-06-05 05:18:05,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:05,481 INFO L87 Difference]: Start difference. First operand 6193 states and 27570 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:08,348 INFO L93 Difference]: Finished difference Result 9040 states and 38619 transitions. [2021-06-05 05:18:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:18:08,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:08,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:08,369 INFO L225 Difference]: With dead ends: 9040 [2021-06-05 05:18:08,369 INFO L226 Difference]: Without dead ends: 8912 [2021-06-05 05:18:08,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1857 ImplicationChecksByTransitivity, 2020.7ms TimeCoverageRelationStatistics Valid=935, Invalid=4917, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:18:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8912 states. [2021-06-05 05:18:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8912 to 6176. [2021-06-05 05:18:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6176 states, 6175 states have (on average 4.4526315789473685) internal successors, (27495), 6175 states have internal predecessors, (27495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 27495 transitions. [2021-06-05 05:18:08,498 INFO L78 Accepts]: Start accepts. Automaton has 6176 states and 27495 transitions. Word has length 30 [2021-06-05 05:18:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:08,499 INFO L482 AbstractCegarLoop]: Abstraction has 6176 states and 27495 transitions. [2021-06-05 05:18:08,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6176 states and 27495 transitions. [2021-06-05 05:18:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:08,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:08,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:08,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:08,709 INFO L430 AbstractCegarLoop]: === Iteration 293 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:08,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1828374158, now seen corresponding path program 69 times [2021-06-05 05:18:08,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:08,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138759521] [2021-06-05 05:18:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:08,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:08,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138759521] [2021-06-05 05:18:08,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138759521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:08,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665074086] [2021-06-05 05:18:08,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:08,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:18:08,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:08,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:08,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:09,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:09,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:18:09,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:09,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:09,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:09,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:18:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:09,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665074086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:09,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:09,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:09,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779824446] [2021-06-05 05:18:09,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:09,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:09,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:09,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:09,099 INFO L87 Difference]: Start difference. First operand 6176 states and 27495 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:12,196 INFO L93 Difference]: Finished difference Result 11312 states and 47496 transitions. [2021-06-05 05:18:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:18:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:12,221 INFO L225 Difference]: With dead ends: 11312 [2021-06-05 05:18:12,221 INFO L226 Difference]: Without dead ends: 11039 [2021-06-05 05:18:12,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2035 ImplicationChecksByTransitivity, 2004.1ms TimeCoverageRelationStatistics Valid=773, Invalid=5389, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:18:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-06-05 05:18:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 6578. [2021-06-05 05:18:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6578 states, 6577 states have (on average 4.472555876539456) internal successors, (29416), 6577 states have internal predecessors, (29416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6578 states to 6578 states and 29416 transitions. [2021-06-05 05:18:12,370 INFO L78 Accepts]: Start accepts. Automaton has 6578 states and 29416 transitions. Word has length 30 [2021-06-05 05:18:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:12,370 INFO L482 AbstractCegarLoop]: Abstraction has 6578 states and 29416 transitions. [2021-06-05 05:18:12,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6578 states and 29416 transitions. [2021-06-05 05:18:12,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:12,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:12,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:12,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:12,581 INFO L430 AbstractCegarLoop]: === Iteration 294 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:12,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1756293980, now seen corresponding path program 66 times [2021-06-05 05:18:12,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:12,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007275716] [2021-06-05 05:18:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:12,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007275716] [2021-06-05 05:18:12,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007275716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987581125] [2021-06-05 05:18:12,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:12,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:18:12,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:12,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:12,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:12,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:12,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:18:12,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:12,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:12,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:12,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:18:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:12,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987581125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:12,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:12,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:18:12,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361623881] [2021-06-05 05:18:12,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:12,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:12,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:12,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:12,940 INFO L87 Difference]: Start difference. First operand 6578 states and 29416 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:15,535 INFO L93 Difference]: Finished difference Result 12152 states and 50932 transitions. [2021-06-05 05:18:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:18:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:15,561 INFO L225 Difference]: With dead ends: 12152 [2021-06-05 05:18:15,561 INFO L226 Difference]: Without dead ends: 11932 [2021-06-05 05:18:15,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 1543.1ms TimeCoverageRelationStatistics Valid=696, Invalid=4416, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:18:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11932 states. [2021-06-05 05:18:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11932 to 6892. [2021-06-05 05:18:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6892 states, 6891 states have (on average 4.462777535916413) internal successors, (30753), 6891 states have internal predecessors, (30753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6892 states to 6892 states and 30753 transitions. [2021-06-05 05:18:15,727 INFO L78 Accepts]: Start accepts. Automaton has 6892 states and 30753 transitions. Word has length 30 [2021-06-05 05:18:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:15,727 INFO L482 AbstractCegarLoop]: Abstraction has 6892 states and 30753 transitions. [2021-06-05 05:18:15,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 6892 states and 30753 transitions. [2021-06-05 05:18:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:15,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:15,739 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:15,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-05 05:18:15,939 INFO L430 AbstractCegarLoop]: === Iteration 295 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:15,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1491451566, now seen corresponding path program 70 times [2021-06-05 05:18:15,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:15,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769184885] [2021-06-05 05:18:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:16,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:16,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769184885] [2021-06-05 05:18:16,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769184885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:16,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174485722] [2021-06-05 05:18:16,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:16,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:16,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:16,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:16,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:16,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:16,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:16,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:16,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:16,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:16,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174485722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:16,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:16,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:16,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550614980] [2021-06-05 05:18:16,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:16,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:16,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:16,249 INFO L87 Difference]: Start difference. First operand 6892 states and 30753 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:18,434 INFO L93 Difference]: Finished difference Result 11628 states and 49138 transitions. [2021-06-05 05:18:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:18:18,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:18,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:18,461 INFO L225 Difference]: With dead ends: 11628 [2021-06-05 05:18:18,461 INFO L226 Difference]: Without dead ends: 11321 [2021-06-05 05:18:18,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 1543.0ms TimeCoverageRelationStatistics Valid=831, Invalid=4281, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:18:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11321 states. [2021-06-05 05:18:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11321 to 7001. [2021-06-05 05:18:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7001 states, 7000 states have (on average 4.461714285714286) internal successors, (31232), 7000 states have internal predecessors, (31232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 31232 transitions. [2021-06-05 05:18:18,637 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 31232 transitions. Word has length 30 [2021-06-05 05:18:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:18,637 INFO L482 AbstractCegarLoop]: Abstraction has 7001 states and 31232 transitions. [2021-06-05 05:18:18,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 31232 transitions. [2021-06-05 05:18:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:18,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:18,649 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:18,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-05 05:18:18,849 INFO L430 AbstractCegarLoop]: === Iteration 296 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1177925170, now seen corresponding path program 71 times [2021-06-05 05:18:18,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:18,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440925878] [2021-06-05 05:18:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:18,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:18,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440925878] [2021-06-05 05:18:18,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440925878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:18,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317417019] [2021-06-05 05:18:18,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:19,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:18:19,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:19,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:19,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:19,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:19,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:19,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:19,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:19,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:19,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317417019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:19,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:19,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963069355] [2021-06-05 05:18:19,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:19,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:19,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:19,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:19,163 INFO L87 Difference]: Start difference. First operand 7001 states and 31232 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:21,765 INFO L93 Difference]: Finished difference Result 13958 states and 58073 transitions. [2021-06-05 05:18:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:18:21,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:21,796 INFO L225 Difference]: With dead ends: 13958 [2021-06-05 05:18:21,796 INFO L226 Difference]: Without dead ends: 13304 [2021-06-05 05:18:21,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 1757.6ms TimeCoverageRelationStatistics Valid=1137, Invalid=5025, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:18:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13304 states. [2021-06-05 05:18:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13304 to 7212. [2021-06-05 05:18:21,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7212 states, 7211 states have (on average 4.459159617251421) internal successors, (32155), 7211 states have internal predecessors, (32155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7212 states to 7212 states and 32155 transitions. [2021-06-05 05:18:21,982 INFO L78 Accepts]: Start accepts. Automaton has 7212 states and 32155 transitions. Word has length 30 [2021-06-05 05:18:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:21,982 INFO L482 AbstractCegarLoop]: Abstraction has 7212 states and 32155 transitions. [2021-06-05 05:18:21,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7212 states and 32155 transitions. [2021-06-05 05:18:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:21,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:21,994 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:22,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:22,194 INFO L430 AbstractCegarLoop]: === Iteration 297 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:22,195 INFO L82 PathProgramCache]: Analyzing trace with hash 318426072, now seen corresponding path program 67 times [2021-06-05 05:18:22,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:22,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090354672] [2021-06-05 05:18:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:22,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:22,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090354672] [2021-06-05 05:18:22,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090354672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:22,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185606812] [2021-06-05 05:18:22,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:22,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:22,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:22,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:22,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:22,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:22,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:22,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185606812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:22,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:22,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:22,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634418709] [2021-06-05 05:18:22,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:22,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:22,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:22,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:22,494 INFO L87 Difference]: Start difference. First operand 7212 states and 32155 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:24,437 INFO L93 Difference]: Finished difference Result 11528 states and 48939 transitions. [2021-06-05 05:18:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:18:24,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:24,462 INFO L225 Difference]: With dead ends: 11528 [2021-06-05 05:18:24,462 INFO L226 Difference]: Without dead ends: 11278 [2021-06-05 05:18:24,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1195.4ms TimeCoverageRelationStatistics Valid=655, Invalid=3127, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:18:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11278 states. [2021-06-05 05:18:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11278 to 7312. [2021-06-05 05:18:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7312 states, 7311 states have (on average 4.461906715907537) internal successors, (32621), 7311 states have internal predecessors, (32621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7312 states to 7312 states and 32621 transitions. [2021-06-05 05:18:24,652 INFO L78 Accepts]: Start accepts. Automaton has 7312 states and 32621 transitions. Word has length 30 [2021-06-05 05:18:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:24,652 INFO L482 AbstractCegarLoop]: Abstraction has 7312 states and 32621 transitions. [2021-06-05 05:18:24,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7312 states and 32621 transitions. [2021-06-05 05:18:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:24,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:24,665 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:24,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:24,866 INFO L430 AbstractCegarLoop]: === Iteration 298 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:24,866 INFO L82 PathProgramCache]: Analyzing trace with hash -137858946, now seen corresponding path program 68 times [2021-06-05 05:18:24,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:24,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733055631] [2021-06-05 05:18:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:24,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:24,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733055631] [2021-06-05 05:18:24,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733055631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:24,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346438672] [2021-06-05 05:18:24,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:25,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:25,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:25,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:25,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:25,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:25,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:18:25,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:25,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:25,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:25,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:18:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:25,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346438672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:25,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:25,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 05:18:25,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231520566] [2021-06-05 05:18:25,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:25,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:25,192 INFO L87 Difference]: Start difference. First operand 7312 states and 32621 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:26,740 INFO L93 Difference]: Finished difference Result 11001 states and 46917 transitions. [2021-06-05 05:18:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:18:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:26,764 INFO L225 Difference]: With dead ends: 11001 [2021-06-05 05:18:26,764 INFO L226 Difference]: Without dead ends: 10911 [2021-06-05 05:18:26,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 953.7ms TimeCoverageRelationStatistics Valid=506, Invalid=2574, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:18:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10911 states. [2021-06-05 05:18:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10911 to 7322. [2021-06-05 05:18:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7322 states, 7321 states have (on average 4.461275781996995) internal successors, (32661), 7321 states have internal predecessors, (32661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7322 states to 7322 states and 32661 transitions. [2021-06-05 05:18:27,004 INFO L78 Accepts]: Start accepts. Automaton has 7322 states and 32661 transitions. Word has length 30 [2021-06-05 05:18:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:27,004 INFO L482 AbstractCegarLoop]: Abstraction has 7322 states and 32661 transitions. [2021-06-05 05:18:27,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7322 states and 32661 transitions. [2021-06-05 05:18:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:27,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:27,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:27,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:27,216 INFO L430 AbstractCegarLoop]: === Iteration 299 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:27,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1812849596, now seen corresponding path program 72 times [2021-06-05 05:18:27,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:27,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848476714] [2021-06-05 05:18:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:27,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:27,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848476714] [2021-06-05 05:18:27,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848476714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:27,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338344707] [2021-06-05 05:18:27,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:27,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:18:27,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:27,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:27,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:18:27,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:27,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:27,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:27,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:18:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:27,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338344707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:27,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:27,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:27,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931035120] [2021-06-05 05:18:27,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:27,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:27,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:27,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:27,616 INFO L87 Difference]: Start difference. First operand 7322 states and 32661 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:29,380 INFO L93 Difference]: Finished difference Result 8866 states and 38516 transitions. [2021-06-05 05:18:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:18:29,381 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:29,399 INFO L225 Difference]: With dead ends: 8866 [2021-06-05 05:18:29,400 INFO L226 Difference]: Without dead ends: 8615 [2021-06-05 05:18:29,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1318.8ms TimeCoverageRelationStatistics Valid=464, Invalid=2616, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:18:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8615 states. [2021-06-05 05:18:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8615 to 7345. [2021-06-05 05:18:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7345 states, 7344 states have (on average 4.459286492374727) internal successors, (32749), 7344 states have internal predecessors, (32749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7345 states to 7345 states and 32749 transitions. [2021-06-05 05:18:29,535 INFO L78 Accepts]: Start accepts. Automaton has 7345 states and 32749 transitions. Word has length 30 [2021-06-05 05:18:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:29,535 INFO L482 AbstractCegarLoop]: Abstraction has 7345 states and 32749 transitions. [2021-06-05 05:18:29,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7345 states and 32749 transitions. [2021-06-05 05:18:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:29,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:29,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:29,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:29,748 INFO L430 AbstractCegarLoop]: === Iteration 300 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1499323200, now seen corresponding path program 73 times [2021-06-05 05:18:29,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:29,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43563758] [2021-06-05 05:18:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:29,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43563758] [2021-06-05 05:18:29,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43563758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502386135] [2021-06-05 05:18:29,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:29,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:29,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:30,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:30,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:30,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:30,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:30,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:30,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502386135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:30,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:30,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:30,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943578959] [2021-06-05 05:18:30,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:30,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:30,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:30,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:30,085 INFO L87 Difference]: Start difference. First operand 7345 states and 32749 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:31,631 INFO L93 Difference]: Finished difference Result 8966 states and 39123 transitions. [2021-06-05 05:18:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:18:31,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:31,650 INFO L225 Difference]: With dead ends: 8966 [2021-06-05 05:18:31,650 INFO L226 Difference]: Without dead ends: 8826 [2021-06-05 05:18:31,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1133.5ms TimeCoverageRelationStatistics Valid=508, Invalid=2248, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:18:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8826 states. [2021-06-05 05:18:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8826 to 7336. [2021-06-05 05:18:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7336 states, 7335 states have (on average 4.459713701431493) internal successors, (32712), 7335 states have internal predecessors, (32712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7336 states to 7336 states and 32712 transitions. [2021-06-05 05:18:31,785 INFO L78 Accepts]: Start accepts. Automaton has 7336 states and 32712 transitions. Word has length 30 [2021-06-05 05:18:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:31,785 INFO L482 AbstractCegarLoop]: Abstraction has 7336 states and 32712 transitions. [2021-06-05 05:18:31,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7336 states and 32712 transitions. [2021-06-05 05:18:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:31,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:31,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:31,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:31,998 INFO L430 AbstractCegarLoop]: === Iteration 301 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:31,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1337074540, now seen corresponding path program 74 times [2021-06-05 05:18:31,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:31,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323061381] [2021-06-05 05:18:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:32,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:32,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323061381] [2021-06-05 05:18:32,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323061381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:32,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760062084] [2021-06-05 05:18:32,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:32,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:32,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:32,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:32,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:32,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:18:32,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:32,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:32,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:32,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 05:18:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760062084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:32,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:32,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:32,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035264210] [2021-06-05 05:18:32,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:32,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:32,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:32,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:32,397 INFO L87 Difference]: Start difference. First operand 7336 states and 32712 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:33,926 INFO L93 Difference]: Finished difference Result 9209 states and 39900 transitions. [2021-06-05 05:18:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:18:33,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:33,945 INFO L225 Difference]: With dead ends: 9209 [2021-06-05 05:18:33,945 INFO L226 Difference]: Without dead ends: 8927 [2021-06-05 05:18:33,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1104.0ms TimeCoverageRelationStatistics Valid=449, Invalid=2203, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:18:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8927 states. [2021-06-05 05:18:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8927 to 7346. [2021-06-05 05:18:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 4.458815520762424) internal successors, (32750), 7345 states have internal predecessors, (32750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 32750 transitions. [2021-06-05 05:18:34,080 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 32750 transitions. Word has length 30 [2021-06-05 05:18:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:34,080 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 32750 transitions. [2021-06-05 05:18:34,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 32750 transitions. [2021-06-05 05:18:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:34,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:34,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:34,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-06-05 05:18:34,293 INFO L430 AbstractCegarLoop]: === Iteration 302 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1392909568, now seen corresponding path program 27 times [2021-06-05 05:18:34,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:34,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003134166] [2021-06-05 05:18:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:34,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:34,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003134166] [2021-06-05 05:18:34,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003134166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:34,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038931061] [2021-06-05 05:18:34,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:34,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:18:34,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:34,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:34,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:34,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:34,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:34,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:34,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:34,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:18:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:34,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038931061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:34,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:34,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:18:34,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152144702] [2021-06-05 05:18:34,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:34,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:34,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:34,615 INFO L87 Difference]: Start difference. First operand 7346 states and 32750 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:35,969 INFO L93 Difference]: Finished difference Result 9450 states and 41039 transitions. [2021-06-05 05:18:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:18:35,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:35,990 INFO L225 Difference]: With dead ends: 9450 [2021-06-05 05:18:35,990 INFO L226 Difference]: Without dead ends: 9120 [2021-06-05 05:18:35,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 874.7ms TimeCoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:18:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2021-06-05 05:18:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 7378. [2021-06-05 05:18:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 4.450318557679274) internal successors, (32830), 7377 states have internal predecessors, (32830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 32830 transitions. [2021-06-05 05:18:36,142 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 32830 transitions. Word has length 30 [2021-06-05 05:18:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:36,142 INFO L482 AbstractCegarLoop]: Abstraction has 7378 states and 32830 transitions. [2021-06-05 05:18:36,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 32830 transitions. [2021-06-05 05:18:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:36,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:36,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:36,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:36,355 INFO L430 AbstractCegarLoop]: === Iteration 303 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:36,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:36,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2097278532, now seen corresponding path program 28 times [2021-06-05 05:18:36,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:36,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297118784] [2021-06-05 05:18:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:36,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:36,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297118784] [2021-06-05 05:18:36,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297118784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:36,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018538210] [2021-06-05 05:18:36,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:36,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:36,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:36,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:36,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:36,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:36,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:36,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:36,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:36,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:36,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018538210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:36,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:36,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:36,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481731456] [2021-06-05 05:18:36,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:36,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:36,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:36,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:36,692 INFO L87 Difference]: Start difference. First operand 7378 states and 32830 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:37,997 INFO L93 Difference]: Finished difference Result 8987 states and 39143 transitions. [2021-06-05 05:18:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:18:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:38,016 INFO L225 Difference]: With dead ends: 8987 [2021-06-05 05:18:38,016 INFO L226 Difference]: Without dead ends: 8847 [2021-06-05 05:18:38,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1011.3ms TimeCoverageRelationStatistics Valid=363, Invalid=1707, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:18:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8847 states. [2021-06-05 05:18:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8847 to 7414. [2021-06-05 05:18:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 4.450290031026575) internal successors, (32990), 7413 states have internal predecessors, (32990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 32990 transitions. [2021-06-05 05:18:38,152 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 32990 transitions. Word has length 30 [2021-06-05 05:18:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:38,152 INFO L482 AbstractCegarLoop]: Abstraction has 7414 states and 32990 transitions. [2021-06-05 05:18:38,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 32990 transitions. [2021-06-05 05:18:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:38,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:38,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:38,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:38,365 INFO L430 AbstractCegarLoop]: === Iteration 304 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:38,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1848911834, now seen corresponding path program 29 times [2021-06-05 05:18:38,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:38,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346424078] [2021-06-05 05:18:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:38,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:38,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346424078] [2021-06-05 05:18:38,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346424078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:38,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025749399] [2021-06-05 05:18:38,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:38,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:18:38,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:38,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:38,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:38,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:38,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:38,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 05:18:38,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:38,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:38,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:38,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:242 [2021-06-05 05:18:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:38,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025749399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:38,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:38,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:18:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309140766] [2021-06-05 05:18:38,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:38,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:38,914 INFO L87 Difference]: Start difference. First operand 7414 states and 32990 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:41,338 INFO L93 Difference]: Finished difference Result 9125 states and 39473 transitions. [2021-06-05 05:18:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:18:41,338 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:41,357 INFO L225 Difference]: With dead ends: 9125 [2021-06-05 05:18:41,358 INFO L226 Difference]: Without dead ends: 8779 [2021-06-05 05:18:41,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1877.9ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:18:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8779 states. [2021-06-05 05:18:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8779 to 7410. [2021-06-05 05:18:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 4.44837359967607) internal successors, (32958), 7409 states have internal predecessors, (32958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 32958 transitions. [2021-06-05 05:18:41,493 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 32958 transitions. Word has length 30 [2021-06-05 05:18:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:41,493 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 32958 transitions. [2021-06-05 05:18:41,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 32958 transitions. [2021-06-05 05:18:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:41,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:41,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:41,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable726,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:41,706 INFO L430 AbstractCegarLoop]: === Iteration 305 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2116354752, now seen corresponding path program 69 times [2021-06-05 05:18:41,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:41,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296697390] [2021-06-05 05:18:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:41,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:41,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296697390] [2021-06-05 05:18:41,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296697390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:41,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244990506] [2021-06-05 05:18:41,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:41,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:18:41,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:41,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:41,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:18:41,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:41,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:41,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:41,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:18:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:42,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244990506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:42,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:42,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:18:42,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237006747] [2021-06-05 05:18:42,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:42,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:42,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:42,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:42,068 INFO L87 Difference]: Start difference. First operand 7410 states and 32958 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:43,720 INFO L93 Difference]: Finished difference Result 8541 states and 37482 transitions. [2021-06-05 05:18:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:18:43,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:43,738 INFO L225 Difference]: With dead ends: 8541 [2021-06-05 05:18:43,738 INFO L226 Difference]: Without dead ends: 8428 [2021-06-05 05:18:43,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1133.1ms TimeCoverageRelationStatistics Valid=397, Invalid=1955, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:18:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2021-06-05 05:18:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 7419. [2021-06-05 05:18:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7419 states, 7418 states have (on average 4.448368832569425) internal successors, (32998), 7418 states have internal predecessors, (32998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7419 states to 7419 states and 32998 transitions. [2021-06-05 05:18:43,869 INFO L78 Accepts]: Start accepts. Automaton has 7419 states and 32998 transitions. Word has length 30 [2021-06-05 05:18:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:43,869 INFO L482 AbstractCegarLoop]: Abstraction has 7419 states and 32998 transitions. [2021-06-05 05:18:43,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:43,869 INFO L276 IsEmpty]: Start isEmpty. Operand 7419 states and 32998 transitions. [2021-06-05 05:18:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:43,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:43,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:44,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:44,082 INFO L430 AbstractCegarLoop]: === Iteration 306 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1728795310, now seen corresponding path program 70 times [2021-06-05 05:18:44,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:44,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032125775] [2021-06-05 05:18:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:44,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032125775] [2021-06-05 05:18:44,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032125775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662677311] [2021-06-05 05:18:44,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:44,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:44,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:44,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:44,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:44,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:44,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:44,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:44,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662677311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:44,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:44,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:44,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174670194] [2021-06-05 05:18:44,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:44,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:44,386 INFO L87 Difference]: Start difference. First operand 7419 states and 32998 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:45,615 INFO L93 Difference]: Finished difference Result 8674 states and 38070 transitions. [2021-06-05 05:18:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:18:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:45,633 INFO L225 Difference]: With dead ends: 8674 [2021-06-05 05:18:45,634 INFO L226 Difference]: Without dead ends: 8585 [2021-06-05 05:18:45,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 938.8ms TimeCoverageRelationStatistics Valid=377, Invalid=1693, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:18:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-06-05 05:18:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 7421. [2021-06-05 05:18:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7421 states, 7420 states have (on average 4.447708894878706) internal successors, (33002), 7420 states have internal predecessors, (33002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7421 states to 7421 states and 33002 transitions. [2021-06-05 05:18:45,766 INFO L78 Accepts]: Start accepts. Automaton has 7421 states and 33002 transitions. Word has length 30 [2021-06-05 05:18:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:45,766 INFO L482 AbstractCegarLoop]: Abstraction has 7421 states and 33002 transitions. [2021-06-05 05:18:45,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7421 states and 33002 transitions. [2021-06-05 05:18:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:45,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:45,779 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:45,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,297 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:45,979 INFO L430 AbstractCegarLoop]: === Iteration 307 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:45,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1722327526, now seen corresponding path program 71 times [2021-06-05 05:18:45,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:45,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314394334] [2021-06-05 05:18:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:46,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:46,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314394334] [2021-06-05 05:18:46,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314394334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:46,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786471642] [2021-06-05 05:18:46,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:46,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:46,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:46,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:46,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:46,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:46,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:46,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:46,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:46,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786471642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:46,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:46,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:18:46,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632435147] [2021-06-05 05:18:46,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:18:46,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:18:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:18:46,349 INFO L87 Difference]: Start difference. First operand 7421 states and 33002 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:47,356 INFO L93 Difference]: Finished difference Result 8467 states and 37247 transitions. [2021-06-05 05:18:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:18:47,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:47,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:47,375 INFO L225 Difference]: With dead ends: 8467 [2021-06-05 05:18:47,375 INFO L226 Difference]: Without dead ends: 8364 [2021-06-05 05:18:47,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 784.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:18:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8364 states. [2021-06-05 05:18:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8364 to 7423. [2021-06-05 05:18:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7423 states, 7422 states have (on average 4.447184047426569) internal successors, (33007), 7422 states have internal predecessors, (33007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 33007 transitions. [2021-06-05 05:18:47,506 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 33007 transitions. Word has length 30 [2021-06-05 05:18:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:47,506 INFO L482 AbstractCegarLoop]: Abstraction has 7423 states and 33007 transitions. [2021-06-05 05:18:47,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 33007 transitions. [2021-06-05 05:18:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:47,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:47,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:47,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-06-05 05:18:47,719 INFO L430 AbstractCegarLoop]: === Iteration 308 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1132246480, now seen corresponding path program 6 times [2021-06-05 05:18:47,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:47,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359328449] [2021-06-05 05:18:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:47,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:47,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359328449] [2021-06-05 05:18:47,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359328449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:47,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311202752] [2021-06-05 05:18:47,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:47,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:18:47,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:48,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:48,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:48,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:48,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:48,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:48,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311202752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:48,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:48,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:48,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812666009] [2021-06-05 05:18:48,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:48,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:48,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:48,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:48,118 INFO L87 Difference]: Start difference. First operand 7423 states and 33007 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:49,297 INFO L93 Difference]: Finished difference Result 8818 states and 38602 transitions. [2021-06-05 05:18:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:18:49,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:49,316 INFO L225 Difference]: With dead ends: 8818 [2021-06-05 05:18:49,316 INFO L226 Difference]: Without dead ends: 8700 [2021-06-05 05:18:49,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 926.1ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:18:49,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8700 states. [2021-06-05 05:18:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8700 to 7442. [2021-06-05 05:18:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7442 states, 7441 states have (on average 4.445370245934686) internal successors, (33078), 7441 states have internal predecessors, (33078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7442 states to 7442 states and 33078 transitions. [2021-06-05 05:18:49,462 INFO L78 Accepts]: Start accepts. Automaton has 7442 states and 33078 transitions. Word has length 30 [2021-06-05 05:18:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:49,462 INFO L482 AbstractCegarLoop]: Abstraction has 7442 states and 33078 transitions. [2021-06-05 05:18:49,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 7442 states and 33078 transitions. [2021-06-05 05:18:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:49,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:49,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:49,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-06-05 05:18:49,675 INFO L430 AbstractCegarLoop]: === Iteration 309 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1752730546, now seen corresponding path program 7 times [2021-06-05 05:18:49,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:49,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994395895] [2021-06-05 05:18:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:49,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:49,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994395895] [2021-06-05 05:18:49,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994395895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:49,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836463956] [2021-06-05 05:18:49,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:49,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:49,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:49,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:49,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:49,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:49,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:49,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:49,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836463956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:49,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:49,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:18:49,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177197658] [2021-06-05 05:18:49,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:18:49,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:49,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:18:49,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:18:49,977 INFO L87 Difference]: Start difference. First operand 7442 states and 33078 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:51,230 INFO L93 Difference]: Finished difference Result 8748 states and 38353 transitions. [2021-06-05 05:18:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:18:51,230 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:51,248 INFO L225 Difference]: With dead ends: 8748 [2021-06-05 05:18:51,249 INFO L226 Difference]: Without dead ends: 8632 [2021-06-05 05:18:51,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:18:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2021-06-05 05:18:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 7431. [2021-06-05 05:18:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7431 states, 7430 states have (on average 4.446164199192463) internal successors, (33035), 7430 states have internal predecessors, (33035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7431 states to 7431 states and 33035 transitions. [2021-06-05 05:18:51,386 INFO L78 Accepts]: Start accepts. Automaton has 7431 states and 33035 transitions. Word has length 30 [2021-06-05 05:18:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:51,386 INFO L482 AbstractCegarLoop]: Abstraction has 7431 states and 33035 transitions. [2021-06-05 05:18:51,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 7431 states and 33035 transitions. [2021-06-05 05:18:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:51,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:51,399 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:51,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 05:18:51,599 INFO L430 AbstractCegarLoop]: === Iteration 310 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:51,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1046851404, now seen corresponding path program 72 times [2021-06-05 05:18:51,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:51,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173493168] [2021-06-05 05:18:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:51,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:51,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173493168] [2021-06-05 05:18:51,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173493168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:51,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948754083] [2021-06-05 05:18:51,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:51,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:18:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:51,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:51,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:51,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:51,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:51,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:51,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:18:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:51,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948754083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:51,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:51,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:51,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408217888] [2021-06-05 05:18:51,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:51,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:51,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:51,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:51,955 INFO L87 Difference]: Start difference. First operand 7431 states and 33035 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:53,795 INFO L93 Difference]: Finished difference Result 8879 states and 38734 transitions. [2021-06-05 05:18:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:18:53,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:53,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:53,814 INFO L225 Difference]: With dead ends: 8879 [2021-06-05 05:18:53,814 INFO L226 Difference]: Without dead ends: 8772 [2021-06-05 05:18:53,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1306.4ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:18:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8772 states. [2021-06-05 05:18:53,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8772 to 7439. [2021-06-05 05:18:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 4.44541543425652) internal successors, (33065), 7438 states have internal predecessors, (33065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 33065 transitions. [2021-06-05 05:18:53,948 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 33065 transitions. Word has length 30 [2021-06-05 05:18:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:53,948 INFO L482 AbstractCegarLoop]: Abstraction has 7439 states and 33065 transitions. [2021-06-05 05:18:53,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 33065 transitions. [2021-06-05 05:18:53,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:53,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:53,960 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:54,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:54,161 INFO L430 AbstractCegarLoop]: === Iteration 311 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:54,161 INFO L82 PathProgramCache]: Analyzing trace with hash -181195952, now seen corresponding path program 8 times [2021-06-05 05:18:54,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:54,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303927843] [2021-06-05 05:18:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:54,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:54,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303927843] [2021-06-05 05:18:54,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303927843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901547270] [2021-06-05 05:18:54,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:54,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:54,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:54,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:54,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:54,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:54,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:54,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:54,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:54,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:18:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:54,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901547270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:54,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:54,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:18:54,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102569937] [2021-06-05 05:18:54,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:54,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:54,544 INFO L87 Difference]: Start difference. First operand 7439 states and 33065 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:56,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:56,271 INFO L93 Difference]: Finished difference Result 9184 states and 39997 transitions. [2021-06-05 05:18:56,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:18:56,271 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:56,290 INFO L225 Difference]: With dead ends: 9184 [2021-06-05 05:18:56,291 INFO L226 Difference]: Without dead ends: 8956 [2021-06-05 05:18:56,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1343.0ms TimeCoverageRelationStatistics Valid=635, Invalid=2905, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:18:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8956 states. [2021-06-05 05:18:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8956 to 7428. [2021-06-05 05:18:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7428 states, 7427 states have (on average 4.446344419011714) internal successors, (33023), 7427 states have internal predecessors, (33023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7428 states to 7428 states and 33023 transitions. [2021-06-05 05:18:56,436 INFO L78 Accepts]: Start accepts. Automaton has 7428 states and 33023 transitions. Word has length 30 [2021-06-05 05:18:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:56,436 INFO L482 AbstractCegarLoop]: Abstraction has 7428 states and 33023 transitions. [2021-06-05 05:18:56,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 7428 states and 33023 transitions. [2021-06-05 05:18:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:56,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:56,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:56,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-06-05 05:18:56,650 INFO L430 AbstractCegarLoop]: === Iteration 312 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:18:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1397881106, now seen corresponding path program 30 times [2021-06-05 05:18:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:56,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339815620] [2021-06-05 05:18:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:56,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:56,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339815620] [2021-06-05 05:18:56,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339815620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:56,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832849793] [2021-06-05 05:18:56,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:56,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:18:56,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:56,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:57,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:57,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:18:57,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:57,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:57,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:57,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:18:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:57,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832849793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:57,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:57,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:57,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548532028] [2021-06-05 05:18:57,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:57,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:57,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:57,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:57,091 INFO L87 Difference]: Start difference. First operand 7428 states and 33023 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:59,638 INFO L93 Difference]: Finished difference Result 11373 states and 48519 transitions. [2021-06-05 05:18:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:18:59,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:18:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:59,662 INFO L225 Difference]: With dead ends: 11373 [2021-06-05 05:18:59,663 INFO L226 Difference]: Without dead ends: 11072 [2021-06-05 05:18:59,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1734.0ms TimeCoverageRelationStatistics Valid=683, Invalid=5017, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:18:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2021-06-05 05:18:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 7702. [2021-06-05 05:18:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7702 states, 7701 states have (on average 4.460329827295157) internal successors, (34349), 7701 states have internal predecessors, (34349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7702 states to 7702 states and 34349 transitions. [2021-06-05 05:18:59,829 INFO L78 Accepts]: Start accepts. Automaton has 7702 states and 34349 transitions. Word has length 30 [2021-06-05 05:18:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:59,829 INFO L482 AbstractCegarLoop]: Abstraction has 7702 states and 34349 transitions. [2021-06-05 05:18:59,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 7702 states and 34349 transitions. [2021-06-05 05:18:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:18:59,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:59,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:00,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable745,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:00,042 INFO L430 AbstractCegarLoop]: === Iteration 313 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:00,043 INFO L82 PathProgramCache]: Analyzing trace with hash 687581948, now seen corresponding path program 9 times [2021-06-05 05:19:00,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:00,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656923720] [2021-06-05 05:19:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:00,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:00,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656923720] [2021-06-05 05:19:00,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656923720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:00,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275379094] [2021-06-05 05:19:00,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:00,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:00,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:00,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:19:00,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:00,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:00,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 56 [2021-06-05 05:19:00,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:19:00,543 INFO L628 ElimStorePlain]: treesize reduction 54, result has 64.7 percent of original size [2021-06-05 05:19:00,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:00,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:348 [2021-06-05 05:19:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:00,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275379094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:00,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:00,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:19:00,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956844495] [2021-06-05 05:19:00,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:00,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:00,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:00,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:00,744 INFO L87 Difference]: Start difference. First operand 7702 states and 34349 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:04,733 INFO L93 Difference]: Finished difference Result 12430 states and 52327 transitions. [2021-06-05 05:19:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:19:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:04,759 INFO L225 Difference]: With dead ends: 12430 [2021-06-05 05:19:04,759 INFO L226 Difference]: Without dead ends: 12266 [2021-06-05 05:19:04,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 3025.2ms TimeCoverageRelationStatistics Valid=965, Invalid=6517, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:19:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12266 states. [2021-06-05 05:19:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12266 to 7721. [2021-06-05 05:19:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7721 states, 7720 states have (on average 4.457642487046632) internal successors, (34413), 7720 states have internal predecessors, (34413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7721 states to 7721 states and 34413 transitions. [2021-06-05 05:19:04,938 INFO L78 Accepts]: Start accepts. Automaton has 7721 states and 34413 transitions. Word has length 30 [2021-06-05 05:19:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:04,938 INFO L482 AbstractCegarLoop]: Abstraction has 7721 states and 34413 transitions. [2021-06-05 05:19:04,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 7721 states and 34413 transitions. [2021-06-05 05:19:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:04,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:04,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:05,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable748 [2021-06-05 05:19:05,152 INFO L430 AbstractCegarLoop]: === Iteration 314 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash 609827348, now seen corresponding path program 10 times [2021-06-05 05:19:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:05,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475977759] [2021-06-05 05:19:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:05,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475977759] [2021-06-05 05:19:05,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475977759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524850272] [2021-06-05 05:19:05,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:05,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:05,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:05,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:05,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:05,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:19:05,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:05,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:05,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:05,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:19:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:05,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524850272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:05,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:05,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:05,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594157448] [2021-06-05 05:19:05,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:05,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:05,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:05,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:05,455 INFO L87 Difference]: Start difference. First operand 7721 states and 34413 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:07,095 INFO L93 Difference]: Finished difference Result 13250 states and 56011 transitions. [2021-06-05 05:19:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:19:07,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:07,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:07,126 INFO L225 Difference]: With dead ends: 13250 [2021-06-05 05:19:07,126 INFO L226 Difference]: Without dead ends: 12863 [2021-06-05 05:19:07,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1026.1ms TimeCoverageRelationStatistics Valid=655, Invalid=2885, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:19:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12863 states. [2021-06-05 05:19:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12863 to 7867. [2021-06-05 05:19:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7867 states, 7866 states have (on average 4.461606915840325) internal successors, (35095), 7866 states have internal predecessors, (35095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7867 states to 7867 states and 35095 transitions. [2021-06-05 05:19:07,323 INFO L78 Accepts]: Start accepts. Automaton has 7867 states and 35095 transitions. Word has length 30 [2021-06-05 05:19:07,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:07,323 INFO L482 AbstractCegarLoop]: Abstraction has 7867 states and 35095 transitions. [2021-06-05 05:19:07,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:07,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7867 states and 35095 transitions. [2021-06-05 05:19:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:07,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:07,336 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:07,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-05 05:19:07,537 INFO L430 AbstractCegarLoop]: === Iteration 315 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:07,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1757351682, now seen corresponding path program 31 times [2021-06-05 05:19:07,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:07,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182182741] [2021-06-05 05:19:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:07,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:07,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182182741] [2021-06-05 05:19:07,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182182741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:07,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937660533] [2021-06-05 05:19:07,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:07,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:07,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:07,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:07,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:07,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:07,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:07,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:07,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937660533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:07,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:07,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:19:07,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131306997] [2021-06-05 05:19:07,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:07,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:07,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:07,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:07,856 INFO L87 Difference]: Start difference. First operand 7867 states and 35095 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:10,007 INFO L93 Difference]: Finished difference Result 11100 states and 47697 transitions. [2021-06-05 05:19:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:19:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:10,030 INFO L225 Difference]: With dead ends: 11100 [2021-06-05 05:19:10,030 INFO L226 Difference]: Without dead ends: 11006 [2021-06-05 05:19:10,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1405.5ms TimeCoverageRelationStatistics Valid=598, Invalid=4094, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:19:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11006 states. [2021-06-05 05:19:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11006 to 8197. [2021-06-05 05:19:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8197 states, 8196 states have (on average 4.448023426061494) internal successors, (36456), 8196 states have internal predecessors, (36456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8197 states to 8197 states and 36456 transitions. [2021-06-05 05:19:10,248 INFO L78 Accepts]: Start accepts. Automaton has 8197 states and 36456 transitions. Word has length 30 [2021-06-05 05:19:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:10,249 INFO L482 AbstractCegarLoop]: Abstraction has 8197 states and 36456 transitions. [2021-06-05 05:19:10,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 8197 states and 36456 transitions. [2021-06-05 05:19:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:10,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:10,262 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:10,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-06-05 05:19:10,463 INFO L430 AbstractCegarLoop]: === Iteration 316 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:10,463 INFO L82 PathProgramCache]: Analyzing trace with hash 925137046, now seen corresponding path program 32 times [2021-06-05 05:19:10,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:10,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190346827] [2021-06-05 05:19:10,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:10,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:10,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190346827] [2021-06-05 05:19:10,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190346827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:10,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239930638] [2021-06-05 05:19:10,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:10,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:10,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:10,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:10,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:10,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:10,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:10,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:10,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:10,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239930638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:10,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:10,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:10,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450519125] [2021-06-05 05:19:10,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:10,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:10,897 INFO L87 Difference]: Start difference. First operand 8197 states and 36456 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:13,709 INFO L93 Difference]: Finished difference Result 11801 states and 50526 transitions. [2021-06-05 05:19:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:19:13,709 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:13,734 INFO L225 Difference]: With dead ends: 11801 [2021-06-05 05:19:13,734 INFO L226 Difference]: Without dead ends: 11608 [2021-06-05 05:19:13,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 2046.9ms TimeCoverageRelationStatistics Valid=769, Invalid=6037, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:19:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11608 states. [2021-06-05 05:19:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11608 to 8439. [2021-06-05 05:19:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8439 states, 8438 states have (on average 4.457335861578573) internal successors, (37611), 8438 states have internal predecessors, (37611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8439 states to 8439 states and 37611 transitions. [2021-06-05 05:19:13,920 INFO L78 Accepts]: Start accepts. Automaton has 8439 states and 37611 transitions. Word has length 30 [2021-06-05 05:19:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:13,920 INFO L482 AbstractCegarLoop]: Abstraction has 8439 states and 37611 transitions. [2021-06-05 05:19:13,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 8439 states and 37611 transitions. [2021-06-05 05:19:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:13,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:13,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:14,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-06-05 05:19:14,135 INFO L430 AbstractCegarLoop]: === Iteration 317 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:14,136 INFO L82 PathProgramCache]: Analyzing trace with hash 68025794, now seen corresponding path program 11 times [2021-06-05 05:19:14,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:14,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526260125] [2021-06-05 05:19:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:14,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:14,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526260125] [2021-06-05 05:19:14,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526260125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:14,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101708778] [2021-06-05 05:19:14,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:14,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:14,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:14,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:14,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:14,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:14,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:14,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:14,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:14,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:14,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101708778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:14,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:14,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:19:14,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113619925] [2021-06-05 05:19:14,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:14,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:14,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:14,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:14,452 INFO L87 Difference]: Start difference. First operand 8439 states and 37611 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:16,279 INFO L93 Difference]: Finished difference Result 12986 states and 55108 transitions. [2021-06-05 05:19:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:19:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:16,309 INFO L225 Difference]: With dead ends: 12986 [2021-06-05 05:19:16,309 INFO L226 Difference]: Without dead ends: 12883 [2021-06-05 05:19:16,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1121.1ms TimeCoverageRelationStatistics Valid=510, Invalid=3150, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:19:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12883 states. [2021-06-05 05:19:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12883 to 8673. [2021-06-05 05:19:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8673 states, 8672 states have (on average 4.460216789667896) internal successors, (38679), 8672 states have internal predecessors, (38679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8673 states to 8673 states and 38679 transitions. [2021-06-05 05:19:16,574 INFO L78 Accepts]: Start accepts. Automaton has 8673 states and 38679 transitions. Word has length 30 [2021-06-05 05:19:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:16,574 INFO L482 AbstractCegarLoop]: Abstraction has 8673 states and 38679 transitions. [2021-06-05 05:19:16,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 8673 states and 38679 transitions. [2021-06-05 05:19:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:16,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:16,589 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:16,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-05 05:19:16,789 INFO L430 AbstractCegarLoop]: === Iteration 318 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1834054326, now seen corresponding path program 12 times [2021-06-05 05:19:16,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:16,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723901687] [2021-06-05 05:19:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:16,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:16,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723901687] [2021-06-05 05:19:16,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723901687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:16,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226987113] [2021-06-05 05:19:16,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:16,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:16,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:16,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:16,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:17,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:17,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:17,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:17,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:17,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:17,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:17,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226987113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:17,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:17,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 05:19:17,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836748726] [2021-06-05 05:19:17,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:17,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:17,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:17,142 INFO L87 Difference]: Start difference. First operand 8673 states and 38679 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:18,811 INFO L93 Difference]: Finished difference Result 13582 states and 57485 transitions. [2021-06-05 05:19:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:19:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:18,842 INFO L225 Difference]: With dead ends: 13582 [2021-06-05 05:19:18,842 INFO L226 Difference]: Without dead ends: 13471 [2021-06-05 05:19:18,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1090.2ms TimeCoverageRelationStatistics Valid=493, Invalid=2929, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:19:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13471 states. [2021-06-05 05:19:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13471 to 8840. [2021-06-05 05:19:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8840 states, 8839 states have (on average 4.465889806539201) internal successors, (39474), 8839 states have internal predecessors, (39474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8840 states to 8840 states and 39474 transitions. [2021-06-05 05:19:19,064 INFO L78 Accepts]: Start accepts. Automaton has 8840 states and 39474 transitions. Word has length 30 [2021-06-05 05:19:19,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:19,064 INFO L482 AbstractCegarLoop]: Abstraction has 8840 states and 39474 transitions. [2021-06-05 05:19:19,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 8840 states and 39474 transitions. [2021-06-05 05:19:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:19,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:19,079 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:19,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:19,280 INFO L430 AbstractCegarLoop]: === Iteration 319 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:19,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:19,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1523173194, now seen corresponding path program 75 times [2021-06-05 05:19:19,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:19,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310733200] [2021-06-05 05:19:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:19,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:19,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310733200] [2021-06-05 05:19:19,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310733200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:19,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170429085] [2021-06-05 05:19:19,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:19,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:19:19,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:19,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:19,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:19:19,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:19,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:19,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:19,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:19:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:19,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170429085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:19,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:19,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:19,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050360251] [2021-06-05 05:19:19,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:19,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:19,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:19,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:19,755 INFO L87 Difference]: Start difference. First operand 8840 states and 39474 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:23,239 INFO L93 Difference]: Finished difference Result 14112 states and 59867 transitions. [2021-06-05 05:19:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:19:23,239 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:23,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:23,271 INFO L225 Difference]: With dead ends: 14112 [2021-06-05 05:19:23,271 INFO L226 Difference]: Without dead ends: 13839 [2021-06-05 05:19:23,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 2232.6ms TimeCoverageRelationStatistics Valid=741, Invalid=5111, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:19:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-06-05 05:19:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 9072. [2021-06-05 05:19:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9072 states, 9071 states have (on average 4.48120383640172) internal successors, (40649), 9071 states have internal predecessors, (40649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9072 states to 9072 states and 40649 transitions. [2021-06-05 05:19:23,486 INFO L78 Accepts]: Start accepts. Automaton has 9072 states and 40649 transitions. Word has length 30 [2021-06-05 05:19:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:23,486 INFO L482 AbstractCegarLoop]: Abstraction has 9072 states and 40649 transitions. [2021-06-05 05:19:23,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 9072 states and 40649 transitions. [2021-06-05 05:19:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:23,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:23,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:23,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:23,702 INFO L430 AbstractCegarLoop]: === Iteration 320 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:23,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2061494944, now seen corresponding path program 73 times [2021-06-05 05:19:23,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:23,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216139217] [2021-06-05 05:19:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:23,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:23,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216139217] [2021-06-05 05:19:23,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216139217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:23,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238707902] [2021-06-05 05:19:23,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:24,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:19:24,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:24,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:24,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:24,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:19:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:24,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238707902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:24,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:24,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:24,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783971643] [2021-06-05 05:19:24,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:24,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:24,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:24,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:24,070 INFO L87 Difference]: Start difference. First operand 9072 states and 40649 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:26,895 INFO L93 Difference]: Finished difference Result 14532 states and 61745 transitions. [2021-06-05 05:19:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:19:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:26,928 INFO L225 Difference]: With dead ends: 14532 [2021-06-05 05:19:26,928 INFO L226 Difference]: Without dead ends: 14328 [2021-06-05 05:19:26,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1620.4ms TimeCoverageRelationStatistics Valid=736, Invalid=4234, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:19:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14328 states. [2021-06-05 05:19:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14328 to 9157. [2021-06-05 05:19:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 9156 states have (on average 4.4853647881170815) internal successors, (41068), 9156 states have internal predecessors, (41068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 41068 transitions. [2021-06-05 05:19:27,167 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 41068 transitions. Word has length 30 [2021-06-05 05:19:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:27,167 INFO L482 AbstractCegarLoop]: Abstraction has 9157 states and 41068 transitions. [2021-06-05 05:19:27,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 41068 transitions. [2021-06-05 05:19:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:27,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:27,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:27,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable773,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:27,384 INFO L430 AbstractCegarLoop]: === Iteration 321 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1796652530, now seen corresponding path program 76 times [2021-06-05 05:19:27,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:27,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058383710] [2021-06-05 05:19:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:27,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:27,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058383710] [2021-06-05 05:19:27,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058383710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:27,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388475548] [2021-06-05 05:19:27,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:27,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:27,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:27,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:27,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:27,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:27,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:27,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:27,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:27,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388475548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:27,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:27,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:27,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759314110] [2021-06-05 05:19:27,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:27,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:27,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:27,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:27,770 INFO L87 Difference]: Start difference. First operand 9157 states and 41068 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:30,613 INFO L93 Difference]: Finished difference Result 13986 states and 59946 transitions. [2021-06-05 05:19:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:19:30,614 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:30,647 INFO L225 Difference]: With dead ends: 13986 [2021-06-05 05:19:30,647 INFO L226 Difference]: Without dead ends: 13650 [2021-06-05 05:19:30,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 2097.9ms TimeCoverageRelationStatistics Valid=1015, Invalid=5305, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:19:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13650 states. [2021-06-05 05:19:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13650 to 9213. [2021-06-05 05:19:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9213 states, 9212 states have (on average 4.486539296569692) internal successors, (41330), 9212 states have internal predecessors, (41330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9213 states to 9213 states and 41330 transitions. [2021-06-05 05:19:30,861 INFO L78 Accepts]: Start accepts. Automaton has 9213 states and 41330 transitions. Word has length 30 [2021-06-05 05:19:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:30,861 INFO L482 AbstractCegarLoop]: Abstraction has 9213 states and 41330 transitions. [2021-06-05 05:19:30,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9213 states and 41330 transitions. [2021-06-05 05:19:30,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:30,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:30,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:31,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 05:19:31,077 INFO L430 AbstractCegarLoop]: === Iteration 322 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1483126134, now seen corresponding path program 77 times [2021-06-05 05:19:31,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:31,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279268121] [2021-06-05 05:19:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:31,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:31,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279268121] [2021-06-05 05:19:31,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279268121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:31,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849083011] [2021-06-05 05:19:31,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:31,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:31,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:31,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:31,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:31,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:31,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:31,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:31,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:31,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:31,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849083011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:31,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:31,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:31,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518929666] [2021-06-05 05:19:31,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:31,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:31,398 INFO L87 Difference]: Start difference. First operand 9213 states and 41330 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:34,484 INFO L93 Difference]: Finished difference Result 16382 states and 69164 transitions. [2021-06-05 05:19:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 05:19:34,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:34,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:34,520 INFO L225 Difference]: With dead ends: 16382 [2021-06-05 05:19:34,521 INFO L226 Difference]: Without dead ends: 15742 [2021-06-05 05:19:34,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2697 ImplicationChecksByTransitivity, 2239.5ms TimeCoverageRelationStatistics Valid=1385, Invalid=6271, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 05:19:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2021-06-05 05:19:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 9237. [2021-06-05 05:19:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9237 states, 9236 states have (on average 4.489281074058034) internal successors, (41463), 9236 states have internal predecessors, (41463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 41463 transitions. [2021-06-05 05:19:34,751 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 41463 transitions. Word has length 30 [2021-06-05 05:19:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:34,751 INFO L482 AbstractCegarLoop]: Abstraction has 9237 states and 41463 transitions. [2021-06-05 05:19:34,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 41463 transitions. [2021-06-05 05:19:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:34,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:34,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:34,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:34,967 INFO L430 AbstractCegarLoop]: === Iteration 323 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:34,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:34,967 INFO L82 PathProgramCache]: Analyzing trace with hash 623627036, now seen corresponding path program 74 times [2021-06-05 05:19:34,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:34,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848919145] [2021-06-05 05:19:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:35,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:35,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848919145] [2021-06-05 05:19:35,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848919145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:35,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64240934] [2021-06-05 05:19:35,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:35,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:35,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:35,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:35,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:35,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:35,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:35,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:35,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:35,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:35,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:35,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64240934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:35,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:35,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:19:35,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381532405] [2021-06-05 05:19:35,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:35,331 INFO L87 Difference]: Start difference. First operand 9237 states and 41463 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:38,089 INFO L93 Difference]: Finished difference Result 13229 states and 56968 transitions. [2021-06-05 05:19:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:19:38,089 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:38,120 INFO L225 Difference]: With dead ends: 13229 [2021-06-05 05:19:38,120 INFO L226 Difference]: Without dead ends: 12942 [2021-06-05 05:19:38,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 1934.7ms TimeCoverageRelationStatistics Valid=792, Invalid=4464, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:19:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12942 states. [2021-06-05 05:19:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12942 to 9225. [2021-06-05 05:19:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9225 states, 9224 states have (on average 4.490134431916739) internal successors, (41417), 9224 states have internal predecessors, (41417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9225 states to 9225 states and 41417 transitions. [2021-06-05 05:19:38,335 INFO L78 Accepts]: Start accepts. Automaton has 9225 states and 41417 transitions. Word has length 30 [2021-06-05 05:19:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:38,335 INFO L482 AbstractCegarLoop]: Abstraction has 9225 states and 41417 transitions. [2021-06-05 05:19:38,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 9225 states and 41417 transitions. [2021-06-05 05:19:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:38,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:38,350 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:38,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-06-05 05:19:38,550 INFO L430 AbstractCegarLoop]: === Iteration 324 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1836286546, now seen corresponding path program 75 times [2021-06-05 05:19:38,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:38,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416385609] [2021-06-05 05:19:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:38,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:38,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416385609] [2021-06-05 05:19:38,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416385609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:38,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506911128] [2021-06-05 05:19:38,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:38,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:38,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:38,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:38,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:38,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:38,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:38,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:38,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:38,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:38,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:38,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506911128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:38,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:38,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:38,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363563818] [2021-06-05 05:19:38,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:38,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:38,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:38,911 INFO L87 Difference]: Start difference. First operand 9225 states and 41417 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:42,129 INFO L93 Difference]: Finished difference Result 12940 states and 56141 transitions. [2021-06-05 05:19:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:19:42,129 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:42,156 INFO L225 Difference]: With dead ends: 12940 [2021-06-05 05:19:42,156 INFO L226 Difference]: Without dead ends: 12697 [2021-06-05 05:19:42,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2335 ImplicationChecksByTransitivity, 2451.2ms TimeCoverageRelationStatistics Valid=1123, Invalid=5519, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:19:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12697 states. [2021-06-05 05:19:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12697 to 9261. [2021-06-05 05:19:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.490604751619871) internal successors, (41583), 9260 states have internal predecessors, (41583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 41583 transitions. [2021-06-05 05:19:42,367 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 41583 transitions. Word has length 30 [2021-06-05 05:19:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:42,367 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 41583 transitions. [2021-06-05 05:19:42,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 41583 transitions. [2021-06-05 05:19:42,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:42,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:42,382 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:42,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable778,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:42,583 INFO L430 AbstractCegarLoop]: === Iteration 325 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:42,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:42,583 INFO L82 PathProgramCache]: Analyzing trace with hash 167342018, now seen corresponding path program 76 times [2021-06-05 05:19:42,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:42,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823281751] [2021-06-05 05:19:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:42,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823281751] [2021-06-05 05:19:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823281751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282151074] [2021-06-05 05:19:42,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:42,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:42,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:42,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:42,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:42,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:42,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:42,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:42,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:42,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:42,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282151074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:42,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:42,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:19:42,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100944115] [2021-06-05 05:19:42,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:19:42,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:42,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:19:42,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:19:42,896 INFO L87 Difference]: Start difference. First operand 9261 states and 41583 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:44,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:44,505 INFO L93 Difference]: Finished difference Result 13065 states and 56568 transitions. [2021-06-05 05:19:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:19:44,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:44,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:44,535 INFO L225 Difference]: With dead ends: 13065 [2021-06-05 05:19:44,535 INFO L226 Difference]: Without dead ends: 12907 [2021-06-05 05:19:44,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1090.1ms TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:19:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12907 states. [2021-06-05 05:19:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12907 to 9259. [2021-06-05 05:19:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9259 states, 9258 states have (on average 4.490062648520198) internal successors, (41569), 9258 states have internal predecessors, (41569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9259 states to 9259 states and 41569 transitions. [2021-06-05 05:19:44,744 INFO L78 Accepts]: Start accepts. Automaton has 9259 states and 41569 transitions. Word has length 30 [2021-06-05 05:19:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:44,744 INFO L482 AbstractCegarLoop]: Abstraction has 9259 states and 41569 transitions. [2021-06-05 05:19:44,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 9259 states and 41569 transitions. [2021-06-05 05:19:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:44,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:44,760 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:44,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:44,960 INFO L430 AbstractCegarLoop]: === Iteration 326 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash 15615248, now seen corresponding path program 78 times [2021-06-05 05:19:44,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:44,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351372931] [2021-06-05 05:19:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:45,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351372931] [2021-06-05 05:19:45,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351372931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271695274] [2021-06-05 05:19:45,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:45,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:19:45,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:45,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:45,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:45,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:19:45,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:45,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:45,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:45,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:19:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:45,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271695274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:45,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:45,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:45,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143188379] [2021-06-05 05:19:45,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:45,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:45,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:45,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:45,349 INFO L87 Difference]: Start difference. First operand 9259 states and 41569 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:48,837 INFO L93 Difference]: Finished difference Result 15478 states and 65441 transitions. [2021-06-05 05:19:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:19:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:48,874 INFO L225 Difference]: With dead ends: 15478 [2021-06-05 05:19:48,874 INFO L226 Difference]: Without dead ends: 15205 [2021-06-05 05:19:48,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 2156.2ms TimeCoverageRelationStatistics Valid=768, Invalid=5552, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:19:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15205 states. [2021-06-05 05:19:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15205 to 9415. [2021-06-05 05:19:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9415 states, 9414 states have (on average 4.497238155937965) internal successors, (42337), 9414 states have internal predecessors, (42337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9415 states to 9415 states and 42337 transitions. [2021-06-05 05:19:49,122 INFO L78 Accepts]: Start accepts. Automaton has 9415 states and 42337 transitions. Word has length 30 [2021-06-05 05:19:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:49,122 INFO L482 AbstractCegarLoop]: Abstraction has 9415 states and 42337 transitions. [2021-06-05 05:19:49,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 9415 states and 42337 transitions. [2021-06-05 05:19:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:49,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:49,139 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:49,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:49,339 INFO L430 AbstractCegarLoop]: === Iteration 327 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash -694683910, now seen corresponding path program 77 times [2021-06-05 05:19:49,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:49,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485056636] [2021-06-05 05:19:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:49,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:49,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485056636] [2021-06-05 05:19:49,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485056636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:49,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628747464] [2021-06-05 05:19:49,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:49,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:49,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:49,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:49,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:49,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:19:49,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:49,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:49,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:49,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:19:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:49,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628747464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:49,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:49,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:49,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603639181] [2021-06-05 05:19:49,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:49,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:49,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:49,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:49,643 INFO L87 Difference]: Start difference. First operand 9415 states and 42337 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:52,542 INFO L93 Difference]: Finished difference Result 15715 states and 66500 transitions. [2021-06-05 05:19:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:19:52,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:52,579 INFO L225 Difference]: With dead ends: 15715 [2021-06-05 05:19:52,579 INFO L226 Difference]: Without dead ends: 15527 [2021-06-05 05:19:52,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 1685.9ms TimeCoverageRelationStatistics Valid=771, Invalid=4631, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:19:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15527 states. [2021-06-05 05:19:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15527 to 9384. [2021-06-05 05:19:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9384 states, 9383 states have (on average 4.499520409250772) internal successors, (42219), 9383 states have internal predecessors, (42219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9384 states to 9384 states and 42219 transitions. [2021-06-05 05:19:52,822 INFO L78 Accepts]: Start accepts. Automaton has 9384 states and 42219 transitions. Word has length 30 [2021-06-05 05:19:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:52,822 INFO L482 AbstractCegarLoop]: Abstraction has 9384 states and 42219 transitions. [2021-06-05 05:19:52,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 9384 states and 42219 transitions. [2021-06-05 05:19:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:52,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:52,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:53,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 05:19:53,038 INFO L430 AbstractCegarLoop]: === Iteration 328 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:53,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1155349756, now seen corresponding path program 79 times [2021-06-05 05:19:53,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:53,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77558640] [2021-06-05 05:19:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:53,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:53,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77558640] [2021-06-05 05:19:53,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77558640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:53,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702027760] [2021-06-05 05:19:53,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:53,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:53,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:53,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:53,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:53,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:53,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702027760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:53,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:53,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:53,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674549802] [2021-06-05 05:19:53,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:53,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:53,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:53,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:53,362 INFO L87 Difference]: Start difference. First operand 9384 states and 42219 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:55,814 INFO L93 Difference]: Finished difference Result 14046 states and 60063 transitions. [2021-06-05 05:19:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:19:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:19:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:55,846 INFO L225 Difference]: With dead ends: 14046 [2021-06-05 05:19:55,846 INFO L226 Difference]: Without dead ends: 13939 [2021-06-05 05:19:55,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1403.6ms TimeCoverageRelationStatistics Valid=578, Invalid=4252, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:19:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2021-06-05 05:19:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 9507. [2021-06-05 05:19:56,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9507 states, 9506 states have (on average 4.493372606774669) internal successors, (42714), 9506 states have internal predecessors, (42714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9507 states to 9507 states and 42714 transitions. [2021-06-05 05:19:56,062 INFO L78 Accepts]: Start accepts. Automaton has 9507 states and 42714 transitions. Word has length 30 [2021-06-05 05:19:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:56,062 INFO L482 AbstractCegarLoop]: Abstraction has 9507 states and 42714 transitions. [2021-06-05 05:19:56,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9507 states and 42714 transitions. [2021-06-05 05:19:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:19:56,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:56,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:56,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-06-05 05:19:56,278 INFO L430 AbstractCegarLoop]: === Iteration 329 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:19:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:56,279 INFO L82 PathProgramCache]: Analyzing trace with hash -457128812, now seen corresponding path program 80 times [2021-06-05 05:19:56,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:56,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327042] [2021-06-05 05:19:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:56,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:56,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327042] [2021-06-05 05:19:56,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:56,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31956957] [2021-06-05 05:19:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:56,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:56,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:56,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:56,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:56,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:56,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:56,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:56,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:56,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31956957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:56,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:56,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:56,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736804508] [2021-06-05 05:19:56,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:56,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:56,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:56,676 INFO L87 Difference]: Start difference. First operand 9507 states and 42714 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:00,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:00,261 INFO L93 Difference]: Finished difference Result 15338 states and 64843 transitions. [2021-06-05 05:20:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 05:20:00,261 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:00,292 INFO L225 Difference]: With dead ends: 15338 [2021-06-05 05:20:00,292 INFO L226 Difference]: Without dead ends: 14982 [2021-06-05 05:20:00,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 2393.3ms TimeCoverageRelationStatistics Valid=861, Invalid=7511, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:20:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14982 states. [2021-06-05 05:20:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14982 to 9743. [2021-06-05 05:20:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9743 states, 9742 states have (on average 4.499589406692671) internal successors, (43835), 9742 states have internal predecessors, (43835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9743 states to 9743 states and 43835 transitions. [2021-06-05 05:20:00,516 INFO L78 Accepts]: Start accepts. Automaton has 9743 states and 43835 transitions. Word has length 30 [2021-06-05 05:20:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:00,516 INFO L482 AbstractCegarLoop]: Abstraction has 9743 states and 43835 transitions. [2021-06-05 05:20:00,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9743 states and 43835 transitions. [2021-06-05 05:20:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:00,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:00,534 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:00,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 05:20:00,735 INFO L430 AbstractCegarLoop]: === Iteration 330 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:00,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1314240064, now seen corresponding path program 78 times [2021-06-05 05:20:00,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:00,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237454402] [2021-06-05 05:20:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:00,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:00,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237454402] [2021-06-05 05:20:00,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237454402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:00,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482537792] [2021-06-05 05:20:00,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:00,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:20:00,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:00,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:00,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:00,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:00,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:00,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:01,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:01,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:01,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:20:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:01,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482537792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:01,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:01,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:20:01,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581819678] [2021-06-05 05:20:01,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:01,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:01,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:01,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:01,085 INFO L87 Difference]: Start difference. First operand 9743 states and 43835 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:03,920 INFO L93 Difference]: Finished difference Result 14261 states and 61281 transitions. [2021-06-05 05:20:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:20:03,921 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:03,955 INFO L225 Difference]: With dead ends: 14261 [2021-06-05 05:20:03,955 INFO L226 Difference]: Without dead ends: 14102 [2021-06-05 05:20:03,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 1731.2ms TimeCoverageRelationStatistics Valid=619, Invalid=4931, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:20:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14102 states. [2021-06-05 05:20:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14102 to 9760. [2021-06-05 05:20:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9760 states, 9759 states have (on average 4.498309252997234) internal successors, (43899), 9759 states have internal predecessors, (43899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9760 states to 9760 states and 43899 transitions. [2021-06-05 05:20:04,201 INFO L78 Accepts]: Start accepts. Automaton has 9760 states and 43899 transitions. Word has length 30 [2021-06-05 05:20:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:04,201 INFO L482 AbstractCegarLoop]: Abstraction has 9760 states and 43899 transitions. [2021-06-05 05:20:04,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 9760 states and 43899 transitions. [2021-06-05 05:20:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:04,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:04,218 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:04,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable789,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:04,418 INFO L430 AbstractCegarLoop]: === Iteration 331 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash 451788468, now seen corresponding path program 79 times [2021-06-05 05:20:04,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:04,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343803280] [2021-06-05 05:20:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:04,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343803280] [2021-06-05 05:20:04,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343803280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791378166] [2021-06-05 05:20:04,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:04,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:04,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:04,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:04,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:04,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:04,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:20:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:04,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791378166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:04,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:04,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:20:04,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749671451] [2021-06-05 05:20:04,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:20:04,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:20:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:20:04,723 INFO L87 Difference]: Start difference. First operand 9760 states and 43899 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:07,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:07,384 INFO L93 Difference]: Finished difference Result 16060 states and 68064 transitions. [2021-06-05 05:20:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:20:07,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:07,424 INFO L225 Difference]: With dead ends: 16060 [2021-06-05 05:20:07,424 INFO L226 Difference]: Without dead ends: 15860 [2021-06-05 05:20:07,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 1438.7ms TimeCoverageRelationStatistics Valid=657, Invalid=4745, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:20:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15860 states. [2021-06-05 05:20:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15860 to 9850. [2021-06-05 05:20:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9850 states, 9849 states have (on average 4.50096456493045) internal successors, (44330), 9849 states have internal predecessors, (44330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9850 states to 9850 states and 44330 transitions. [2021-06-05 05:20:07,746 INFO L78 Accepts]: Start accepts. Automaton has 9850 states and 44330 transitions. Word has length 30 [2021-06-05 05:20:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:07,746 INFO L482 AbstractCegarLoop]: Abstraction has 9850 states and 44330 transitions. [2021-06-05 05:20:07,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 9850 states and 44330 transitions. [2021-06-05 05:20:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:07,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:07,763 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:07,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:07,964 INFO L430 AbstractCegarLoop]: === Iteration 332 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:07,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1712253756, now seen corresponding path program 81 times [2021-06-05 05:20:07,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:07,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059336324] [2021-06-05 05:20:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:08,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:08,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059336324] [2021-06-05 05:20:08,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059336324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:08,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348568934] [2021-06-05 05:20:08,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:08,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:20:08,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:08,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:08,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:08,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:08,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:08,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:08,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:08,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:08,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:08,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348568934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:08,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:08,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:08,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321139598] [2021-06-05 05:20:08,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:08,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:08,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:08,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:08,373 INFO L87 Difference]: Start difference. First operand 9850 states and 44330 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:11,213 INFO L93 Difference]: Finished difference Result 12561 states and 54808 transitions. [2021-06-05 05:20:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:20:11,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:11,241 INFO L225 Difference]: With dead ends: 12561 [2021-06-05 05:20:11,242 INFO L226 Difference]: Without dead ends: 12405 [2021-06-05 05:20:11,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 2065.5ms TimeCoverageRelationStatistics Valid=676, Invalid=4436, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:20:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12405 states. [2021-06-05 05:20:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12405 to 9865. [2021-06-05 05:20:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9865 states, 9864 states have (on average 4.5012165450121655) internal successors, (44400), 9864 states have internal predecessors, (44400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9865 states to 9865 states and 44400 transitions. [2021-06-05 05:20:11,513 INFO L78 Accepts]: Start accepts. Automaton has 9865 states and 44400 transitions. Word has length 30 [2021-06-05 05:20:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:11,513 INFO L482 AbstractCegarLoop]: Abstraction has 9865 states and 44400 transitions. [2021-06-05 05:20:11,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 9865 states and 44400 transitions. [2021-06-05 05:20:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:11,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:11,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:11,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:11,731 INFO L430 AbstractCegarLoop]: === Iteration 333 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:11,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1398727360, now seen corresponding path program 82 times [2021-06-05 05:20:11,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:11,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602499983] [2021-06-05 05:20:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:11,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:11,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602499983] [2021-06-05 05:20:11,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602499983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:11,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929845874] [2021-06-05 05:20:11,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:11,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:11,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:11,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:11,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:11,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:11,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:11,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:11,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:12,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929845874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:12,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:12,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:12,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085403432] [2021-06-05 05:20:12,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:12,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:12,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:12,049 INFO L87 Difference]: Start difference. First operand 9865 states and 44400 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:14,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:14,811 INFO L93 Difference]: Finished difference Result 13360 states and 58203 transitions. [2021-06-05 05:20:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:20:14,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:14,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:14,843 INFO L225 Difference]: With dead ends: 13360 [2021-06-05 05:20:14,843 INFO L226 Difference]: Without dead ends: 13261 [2021-06-05 05:20:14,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 2028.0ms TimeCoverageRelationStatistics Valid=960, Invalid=4740, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:20:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13261 states. [2021-06-05 05:20:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13261 to 9871. [2021-06-05 05:20:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9871 states, 9870 states have (on average 4.5013171225937185) internal successors, (44428), 9870 states have internal predecessors, (44428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9871 states to 9871 states and 44428 transitions. [2021-06-05 05:20:15,079 INFO L78 Accepts]: Start accepts. Automaton has 9871 states and 44428 transitions. Word has length 30 [2021-06-05 05:20:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:15,079 INFO L482 AbstractCegarLoop]: Abstraction has 9871 states and 44428 transitions. [2021-06-05 05:20:15,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states and 44428 transitions. [2021-06-05 05:20:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:15,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:15,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:15,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-05 05:20:15,383 INFO L430 AbstractCegarLoop]: === Iteration 334 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:15,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1286149214, now seen corresponding path program 83 times [2021-06-05 05:20:15,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:15,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673729779] [2021-06-05 05:20:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:15,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:15,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673729779] [2021-06-05 05:20:15,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673729779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:15,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174537208] [2021-06-05 05:20:15,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:15,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:20:15,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:15,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:15,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:15,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:15,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:15,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:15,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:15,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:15,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174537208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:15,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:15,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:20:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763904194] [2021-06-05 05:20:15,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:20:15,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:20:15,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:20:15,717 INFO L87 Difference]: Start difference. First operand 9871 states and 44428 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:17,770 INFO L93 Difference]: Finished difference Result 12456 states and 54560 transitions. [2021-06-05 05:20:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:20:17,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:17,801 INFO L225 Difference]: With dead ends: 12456 [2021-06-05 05:20:17,801 INFO L226 Difference]: Without dead ends: 12383 [2021-06-05 05:20:17,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1449.7ms TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:20:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12383 states. [2021-06-05 05:20:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12383 to 9877. [2021-06-05 05:20:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9877 states, 9876 states have (on average 4.501316322397732) internal successors, (44455), 9876 states have internal predecessors, (44455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9877 states to 9877 states and 44455 transitions. [2021-06-05 05:20:18,017 INFO L78 Accepts]: Start accepts. Automaton has 9877 states and 44455 transitions. Word has length 30 [2021-06-05 05:20:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:18,017 INFO L482 AbstractCegarLoop]: Abstraction has 9877 states and 44455 transitions. [2021-06-05 05:20:18,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 9877 states and 44455 transitions. [2021-06-05 05:20:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:18,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:18,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:18,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 05:20:18,235 INFO L430 AbstractCegarLoop]: === Iteration 335 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash -621746472, now seen corresponding path program 84 times [2021-06-05 05:20:18,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:18,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813434906] [2021-06-05 05:20:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:18,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:18,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813434906] [2021-06-05 05:20:18,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813434906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:18,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390516661] [2021-06-05 05:20:18,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:18,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:20:18,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:18,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:20:18,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:18,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:18,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:18,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:20:18,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:18,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:18,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:18,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 05:20:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:18,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390516661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:18,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:18,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:20:18,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49821735] [2021-06-05 05:20:18,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:20:18,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:18,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:20:18,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:18,704 INFO L87 Difference]: Start difference. First operand 9877 states and 44455 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:19,193 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-06-05 05:20:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:21,670 INFO L93 Difference]: Finished difference Result 12108 states and 53087 transitions. [2021-06-05 05:20:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:20:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:21,697 INFO L225 Difference]: With dead ends: 12108 [2021-06-05 05:20:21,697 INFO L226 Difference]: Without dead ends: 11938 [2021-06-05 05:20:21,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2300.9ms TimeCoverageRelationStatistics Valid=823, Invalid=4579, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:20:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11938 states. [2021-06-05 05:20:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11938 to 9893. [2021-06-05 05:20:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9893 states, 9892 states have (on average 4.4992923574605745) internal successors, (44507), 9892 states have internal predecessors, (44507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9893 states to 9893 states and 44507 transitions. [2021-06-05 05:20:21,900 INFO L78 Accepts]: Start accepts. Automaton has 9893 states and 44507 transitions. Word has length 30 [2021-06-05 05:20:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:21,900 INFO L482 AbstractCegarLoop]: Abstraction has 9893 states and 44507 transitions. [2021-06-05 05:20:21,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 9893 states and 44507 transitions. [2021-06-05 05:20:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:21,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:21,917 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:22,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable797 [2021-06-05 05:20:22,117 INFO L430 AbstractCegarLoop]: === Iteration 336 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2115156472, now seen corresponding path program 85 times [2021-06-05 05:20:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:22,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397967660] [2021-06-05 05:20:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:22,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397967660] [2021-06-05 05:20:22,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397967660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399196482] [2021-06-05 05:20:22,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:22,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:22,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:22,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:22,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:22,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:22,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399196482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:22,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:22,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:22,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658161267] [2021-06-05 05:20:22,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:22,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:22,443 INFO L87 Difference]: Start difference. First operand 9893 states and 44507 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:24,849 INFO L93 Difference]: Finished difference Result 13712 states and 59410 transitions. [2021-06-05 05:20:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:20:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:24,881 INFO L225 Difference]: With dead ends: 13712 [2021-06-05 05:20:24,881 INFO L226 Difference]: Without dead ends: 13619 [2021-06-05 05:20:24,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 1646.6ms TimeCoverageRelationStatistics Valid=983, Invalid=5023, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:20:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13619 states. [2021-06-05 05:20:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13619 to 9881. [2021-06-05 05:20:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9881 states, 9880 states have (on average 4.5012145748987855) internal successors, (44472), 9880 states have internal predecessors, (44472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9881 states to 9881 states and 44472 transitions. [2021-06-05 05:20:25,109 INFO L78 Accepts]: Start accepts. Automaton has 9881 states and 44472 transitions. Word has length 30 [2021-06-05 05:20:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:25,109 INFO L482 AbstractCegarLoop]: Abstraction has 9881 states and 44472 transitions. [2021-06-05 05:20:25,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 9881 states and 44472 transitions. [2021-06-05 05:20:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:25,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:25,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:25,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:25,326 INFO L430 AbstractCegarLoop]: === Iteration 337 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:25,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2004949928, now seen corresponding path program 86 times [2021-06-05 05:20:25,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:25,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606321192] [2021-06-05 05:20:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:25,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:25,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606321192] [2021-06-05 05:20:25,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606321192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:25,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088509537] [2021-06-05 05:20:25,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:25,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:25,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:25,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:25,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:25,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:25,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:25,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:25,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:25,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:25,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088509537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:25,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:25,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:25,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702364604] [2021-06-05 05:20:25,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:25,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:25,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:25,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:25,722 INFO L87 Difference]: Start difference. First operand 9881 states and 44472 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:28,864 INFO L93 Difference]: Finished difference Result 14002 states and 60636 transitions. [2021-06-05 05:20:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:20:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:28,895 INFO L225 Difference]: With dead ends: 14002 [2021-06-05 05:20:28,895 INFO L226 Difference]: Without dead ends: 13695 [2021-06-05 05:20:28,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 2264.1ms TimeCoverageRelationStatistics Valid=962, Invalid=5200, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:20:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13695 states. [2021-06-05 05:20:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13695 to 9901. [2021-06-05 05:20:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9901 states, 9900 states have (on average 4.502020202020202) internal successors, (44570), 9900 states have internal predecessors, (44570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9901 states to 9901 states and 44570 transitions. [2021-06-05 05:20:29,124 INFO L78 Accepts]: Start accepts. Automaton has 9901 states and 44570 transitions. Word has length 30 [2021-06-05 05:20:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:29,125 INFO L482 AbstractCegarLoop]: Abstraction has 9901 states and 44570 transitions. [2021-06-05 05:20:29,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 9901 states and 44570 transitions. [2021-06-05 05:20:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:29,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:29,142 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:29,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:29,343 INFO L430 AbstractCegarLoop]: === Iteration 338 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:29,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:29,343 INFO L82 PathProgramCache]: Analyzing trace with hash 530726706, now seen corresponding path program 87 times [2021-06-05 05:20:29,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:29,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641204249] [2021-06-05 05:20:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:29,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:29,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641204249] [2021-06-05 05:20:29,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641204249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:29,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659141967] [2021-06-05 05:20:29,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:29,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:20:29,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:29,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:29,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:29,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:29,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:29,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:29,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:29,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:29,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659141967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:29,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:29,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:29,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204293344] [2021-06-05 05:20:29,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:29,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:29,739 INFO L87 Difference]: Start difference. First operand 9901 states and 44570 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:31,417 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 05:20:32,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:32,356 INFO L93 Difference]: Finished difference Result 13470 states and 58641 transitions. [2021-06-05 05:20:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:20:32,356 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:32,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:32,385 INFO L225 Difference]: With dead ends: 13470 [2021-06-05 05:20:32,385 INFO L226 Difference]: Without dead ends: 13308 [2021-06-05 05:20:32,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 1966.0ms TimeCoverageRelationStatistics Valid=918, Invalid=5088, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:20:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13308 states. [2021-06-05 05:20:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13308 to 9887. [2021-06-05 05:20:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9887 states, 9886 states have (on average 4.50283228808416) internal successors, (44515), 9886 states have internal predecessors, (44515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9887 states to 9887 states and 44515 transitions. [2021-06-05 05:20:32,597 INFO L78 Accepts]: Start accepts. Automaton has 9887 states and 44515 transitions. Word has length 30 [2021-06-05 05:20:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:32,597 INFO L482 AbstractCegarLoop]: Abstraction has 9887 states and 44515 transitions. [2021-06-05 05:20:32,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,597 INFO L276 IsEmpty]: Start isEmpty. Operand 9887 states and 44515 transitions. [2021-06-05 05:20:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:32,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:32,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:32,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:32,814 INFO L430 AbstractCegarLoop]: === Iteration 339 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:32,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2078016704, now seen corresponding path program 80 times [2021-06-05 05:20:32,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:32,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101833379] [2021-06-05 05:20:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:32,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:32,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101833379] [2021-06-05 05:20:32,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101833379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:32,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314542134] [2021-06-05 05:20:32,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:32,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:32,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:32,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:32,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:33,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:33,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:33,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:33,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:33,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:33,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:33,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314542134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:33,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:33,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:20:33,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477263327] [2021-06-05 05:20:33,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:33,187 INFO L87 Difference]: Start difference. First operand 9887 states and 44515 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:35,481 INFO L93 Difference]: Finished difference Result 12356 states and 54291 transitions. [2021-06-05 05:20:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:20:35,481 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:35,509 INFO L225 Difference]: With dead ends: 12356 [2021-06-05 05:20:35,510 INFO L226 Difference]: Without dead ends: 12267 [2021-06-05 05:20:35,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1658.2ms TimeCoverageRelationStatistics Valid=522, Invalid=3138, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:20:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12267 states. [2021-06-05 05:20:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12267 to 9919. [2021-06-05 05:20:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9919 states, 9918 states have (on average 4.502722323049002) internal successors, (44658), 9918 states have internal predecessors, (44658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9919 states to 9919 states and 44658 transitions. [2021-06-05 05:20:35,733 INFO L78 Accepts]: Start accepts. Automaton has 9919 states and 44658 transitions. Word has length 30 [2021-06-05 05:20:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:35,733 INFO L482 AbstractCegarLoop]: Abstraction has 9919 states and 44658 transitions. [2021-06-05 05:20:35,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 9919 states and 44658 transitions. [2021-06-05 05:20:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:35,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:35,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:35,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable809 [2021-06-05 05:20:35,950 INFO L430 AbstractCegarLoop]: === Iteration 340 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:35,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:35,951 INFO L82 PathProgramCache]: Analyzing trace with hash -381896878, now seen corresponding path program 81 times [2021-06-05 05:20:35,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:35,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065487379] [2021-06-05 05:20:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:36,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:36,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065487379] [2021-06-05 05:20:36,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065487379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:36,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773454484] [2021-06-05 05:20:36,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:36,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:20:36,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:36,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:36,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:36,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:36,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:36,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:36,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:36,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:36,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773454484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:36,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:36,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:36,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986049804] [2021-06-05 05:20:36,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:36,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:36,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:36,329 INFO L87 Difference]: Start difference. First operand 9919 states and 44658 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:38,865 INFO L93 Difference]: Finished difference Result 12453 states and 54704 transitions. [2021-06-05 05:20:38,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:20:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:38,892 INFO L225 Difference]: With dead ends: 12453 [2021-06-05 05:20:38,893 INFO L226 Difference]: Without dead ends: 12313 [2021-06-05 05:20:38,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 1788.3ms TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:20:38,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12313 states. [2021-06-05 05:20:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12313 to 9913. [2021-06-05 05:20:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9913 states, 9912 states have (on average 4.5026230831315575) internal successors, (44630), 9912 states have internal predecessors, (44630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9913 states to 9913 states and 44630 transitions. [2021-06-05 05:20:39,184 INFO L78 Accepts]: Start accepts. Automaton has 9913 states and 44630 transitions. Word has length 30 [2021-06-05 05:20:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:39,184 INFO L482 AbstractCegarLoop]: Abstraction has 9913 states and 44630 transitions. [2021-06-05 05:20:39,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9913 states and 44630 transitions. [2021-06-05 05:20:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:39,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:39,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:39,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-05 05:20:39,402 INFO L430 AbstractCegarLoop]: === Iteration 341 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:39,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:39,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1621731686, now seen corresponding path program 82 times [2021-06-05 05:20:39,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:39,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506930363] [2021-06-05 05:20:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:39,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506930363] [2021-06-05 05:20:39,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506930363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090762779] [2021-06-05 05:20:39,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:39,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:39,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:39,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:39,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:39,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:39,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:39,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:39,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090762779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:39,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:39,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:20:39,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554219786] [2021-06-05 05:20:39,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:20:39,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:20:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:20:39,691 INFO L87 Difference]: Start difference. First operand 9913 states and 44630 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:41,329 INFO L93 Difference]: Finished difference Result 12324 states and 54278 transitions. [2021-06-05 05:20:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:20:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:41,356 INFO L225 Difference]: With dead ends: 12324 [2021-06-05 05:20:41,357 INFO L226 Difference]: Without dead ends: 12231 [2021-06-05 05:20:41,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1118.2ms TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:20:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12231 states. [2021-06-05 05:20:41,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12231 to 9908. [2021-06-05 05:20:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9908 states, 9907 states have (on average 4.501665489048148) internal successors, (44598), 9907 states have internal predecessors, (44598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9908 states to 9908 states and 44598 transitions. [2021-06-05 05:20:41,563 INFO L78 Accepts]: Start accepts. Automaton has 9908 states and 44598 transitions. Word has length 30 [2021-06-05 05:20:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:41,563 INFO L482 AbstractCegarLoop]: Abstraction has 9908 states and 44598 transitions. [2021-06-05 05:20:41,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 9908 states and 44598 transitions. [2021-06-05 05:20:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:41,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:41,579 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:41,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:41,780 INFO L430 AbstractCegarLoop]: === Iteration 342 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash -920386266, now seen corresponding path program 83 times [2021-06-05 05:20:41,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:41,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947945016] [2021-06-05 05:20:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:41,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:41,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947945016] [2021-06-05 05:20:41,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947945016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:41,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209329784] [2021-06-05 05:20:41,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:41,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:41,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:41,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:42,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:42,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:42,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:42,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:42,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:42,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209329784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:42,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:42,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:20:42,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572771898] [2021-06-05 05:20:42,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:20:42,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:42,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:20:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:20:42,084 INFO L87 Difference]: Start difference. First operand 9908 states and 44598 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:43,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:43,883 INFO L93 Difference]: Finished difference Result 12376 states and 54412 transitions. [2021-06-05 05:20:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:20:43,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:43,914 INFO L225 Difference]: With dead ends: 12376 [2021-06-05 05:20:43,914 INFO L226 Difference]: Without dead ends: 12303 [2021-06-05 05:20:43,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1255.7ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:20:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12303 states. [2021-06-05 05:20:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12303 to 9928. [2021-06-05 05:20:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9928 states, 9927 states have (on average 4.501460662838722) internal successors, (44686), 9927 states have internal predecessors, (44686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9928 states to 9928 states and 44686 transitions. [2021-06-05 05:20:44,147 INFO L78 Accepts]: Start accepts. Automaton has 9928 states and 44686 transitions. Word has length 30 [2021-06-05 05:20:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:44,147 INFO L482 AbstractCegarLoop]: Abstraction has 9928 states and 44686 transitions. [2021-06-05 05:20:44,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 9928 states and 44686 transitions. [2021-06-05 05:20:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:44,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:44,165 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:44,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-05 05:20:44,365 INFO L430 AbstractCegarLoop]: === Iteration 343 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:44,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1172443720, now seen corresponding path program 84 times [2021-06-05 05:20:44,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:44,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683046236] [2021-06-05 05:20:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:44,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:44,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683046236] [2021-06-05 05:20:44,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683046236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:44,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507710529] [2021-06-05 05:20:44,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:44,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:20:44,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:44,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:44,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:44,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:20:44,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:44,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:44,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:44,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-05 05:20:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:44,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507710529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:44,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:44,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:20:44,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257770902] [2021-06-05 05:20:44,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:20:44,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:20:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:44,822 INFO L87 Difference]: Start difference. First operand 9928 states and 44686 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:47,016 INFO L93 Difference]: Finished difference Result 11482 states and 50761 transitions. [2021-06-05 05:20:47,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:20:47,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:47,041 INFO L225 Difference]: With dead ends: 11482 [2021-06-05 05:20:47,041 INFO L226 Difference]: Without dead ends: 11330 [2021-06-05 05:20:47,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1684.6ms TimeCoverageRelationStatistics Valid=489, Invalid=3543, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:20:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11330 states. [2021-06-05 05:20:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11330 to 9925. [2021-06-05 05:20:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9925 states, 9924 states have (on average 4.501511487303507) internal successors, (44673), 9924 states have internal predecessors, (44673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 44673 transitions. [2021-06-05 05:20:47,239 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 44673 transitions. Word has length 30 [2021-06-05 05:20:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:47,239 INFO L482 AbstractCegarLoop]: Abstraction has 9925 states and 44673 transitions. [2021-06-05 05:20:47,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 44673 transitions. [2021-06-05 05:20:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:47,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:47,256 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:47,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:47,456 INFO L430 AbstractCegarLoop]: === Iteration 344 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash 708148730, now seen corresponding path program 85 times [2021-06-05 05:20:47,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:47,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008185366] [2021-06-05 05:20:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:47,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:47,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008185366] [2021-06-05 05:20:47,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008185366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:47,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44898598] [2021-06-05 05:20:47,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:47,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:47,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:47,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:47,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:47,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:47,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:47,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44898598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:47,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:47,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:47,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617291995] [2021-06-05 05:20:47,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:47,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:47,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:47,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:47,754 INFO L87 Difference]: Start difference. First operand 9925 states and 44673 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:49,883 INFO L93 Difference]: Finished difference Result 13508 states and 58566 transitions. [2021-06-05 05:20:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:20:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:49,914 INFO L225 Difference]: With dead ends: 13508 [2021-06-05 05:20:49,914 INFO L226 Difference]: Without dead ends: 13423 [2021-06-05 05:20:49,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 1521.5ms TimeCoverageRelationStatistics Valid=862, Invalid=4394, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:20:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13423 states. [2021-06-05 05:20:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13423 to 9924. [2021-06-05 05:20:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9924 states, 9923 states have (on average 4.501158923712587) internal successors, (44665), 9923 states have internal predecessors, (44665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9924 states to 9924 states and 44665 transitions. [2021-06-05 05:20:50,126 INFO L78 Accepts]: Start accepts. Automaton has 9924 states and 44665 transitions. Word has length 30 [2021-06-05 05:20:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:50,126 INFO L482 AbstractCegarLoop]: Abstraction has 9924 states and 44665 transitions. [2021-06-05 05:20:50,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 9924 states and 44665 transitions. [2021-06-05 05:20:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:50,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:50,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:50,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 05:20:50,343 INFO L430 AbstractCegarLoop]: === Iteration 345 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:50,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1724677896, now seen corresponding path program 86 times [2021-06-05 05:20:50,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:50,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637751312] [2021-06-05 05:20:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:50,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:50,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637751312] [2021-06-05 05:20:50,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637751312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:50,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694234862] [2021-06-05 05:20:50,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:50,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:50,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:50,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:50,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:50,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:50,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:50,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:50,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:50,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:50,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694234862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:50,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:50,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:50,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778976837] [2021-06-05 05:20:50,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:50,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:50,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:50,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:50,771 INFO L87 Difference]: Start difference. First operand 9924 states and 44665 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:54,004 INFO L93 Difference]: Finished difference Result 14061 states and 61050 transitions. [2021-06-05 05:20:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:20:54,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:54,038 INFO L225 Difference]: With dead ends: 14061 [2021-06-05 05:20:54,038 INFO L226 Difference]: Without dead ends: 13905 [2021-06-05 05:20:54,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 2270.6ms TimeCoverageRelationStatistics Valid=1127, Invalid=6355, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:20:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13905 states. [2021-06-05 05:20:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13905 to 9934. [2021-06-05 05:20:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9934 states, 9933 states have (on average 4.500151011778919) internal successors, (44700), 9933 states have internal predecessors, (44700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9934 states to 9934 states and 44700 transitions. [2021-06-05 05:20:54,288 INFO L78 Accepts]: Start accepts. Automaton has 9934 states and 44700 transitions. Word has length 30 [2021-06-05 05:20:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:54,288 INFO L482 AbstractCegarLoop]: Abstraction has 9934 states and 44700 transitions. [2021-06-05 05:20:54,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 9934 states and 44700 transitions. [2021-06-05 05:20:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:54,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:54,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:54,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable821,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:54,588 INFO L430 AbstractCegarLoop]: === Iteration 346 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1933822546, now seen corresponding path program 87 times [2021-06-05 05:20:54,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:54,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966190009] [2021-06-05 05:20:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:54,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:54,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966190009] [2021-06-05 05:20:54,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966190009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:54,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723701930] [2021-06-05 05:20:54,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:54,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:20:54,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:54,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:54,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:54,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:54,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:54,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:54,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:54,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:54,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723701930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:54,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:54,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:54,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295231140] [2021-06-05 05:20:54,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:54,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:54,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:54,936 INFO L87 Difference]: Start difference. First operand 9934 states and 44700 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:57,604 INFO L93 Difference]: Finished difference Result 14483 states and 62358 transitions. [2021-06-05 05:20:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:20:57,605 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:20:57,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:57,638 INFO L225 Difference]: With dead ends: 14483 [2021-06-05 05:20:57,638 INFO L226 Difference]: Without dead ends: 14412 [2021-06-05 05:20:57,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 1888.0ms TimeCoverageRelationStatistics Valid=1089, Invalid=5883, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:20:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14412 states. [2021-06-05 05:20:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14412 to 9915. [2021-06-05 05:20:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9915 states, 9914 states have (on average 4.499394795239056) internal successors, (44607), 9914 states have internal predecessors, (44607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9915 states to 9915 states and 44607 transitions. [2021-06-05 05:20:57,876 INFO L78 Accepts]: Start accepts. Automaton has 9915 states and 44607 transitions. Word has length 30 [2021-06-05 05:20:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:57,876 INFO L482 AbstractCegarLoop]: Abstraction has 9915 states and 44607 transitions. [2021-06-05 05:20:57,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 9915 states and 44607 transitions. [2021-06-05 05:20:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:20:57,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:57,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:58,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:58,093 INFO L430 AbstractCegarLoop]: === Iteration 347 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:20:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:58,094 INFO L82 PathProgramCache]: Analyzing trace with hash -803512398, now seen corresponding path program 88 times [2021-06-05 05:20:58,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:58,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912802355] [2021-06-05 05:20:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:58,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:58,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912802355] [2021-06-05 05:20:58,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912802355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:58,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121908220] [2021-06-05 05:20:58,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:58,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:58,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:58,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:58,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:58,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:58,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:58,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:58,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:58,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:20:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:58,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121908220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:58,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:58,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:20:58,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726643939] [2021-06-05 05:20:58,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:20:58,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:58,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:20:58,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:20:58,524 INFO L87 Difference]: Start difference. First operand 9915 states and 44607 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:00,441 INFO L93 Difference]: Finished difference Result 11313 states and 50234 transitions. [2021-06-05 05:21:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:21:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:00,465 INFO L225 Difference]: With dead ends: 11313 [2021-06-05 05:21:00,465 INFO L226 Difference]: Without dead ends: 11199 [2021-06-05 05:21:00,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1570.0ms TimeCoverageRelationStatistics Valid=524, Invalid=2782, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:21:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11199 states. [2021-06-05 05:21:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11199 to 9949. [2021-06-05 05:21:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9949 states, 9948 states have (on average 4.497587454764777) internal successors, (44742), 9948 states have internal predecessors, (44742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9949 states to 9949 states and 44742 transitions. [2021-06-05 05:21:00,656 INFO L78 Accepts]: Start accepts. Automaton has 9949 states and 44742 transitions. Word has length 30 [2021-06-05 05:21:00,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:00,656 INFO L482 AbstractCegarLoop]: Abstraction has 9949 states and 44742 transitions. [2021-06-05 05:21:00,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9949 states and 44742 transitions. [2021-06-05 05:21:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:00,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:00,672 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:00,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable826 [2021-06-05 05:21:00,872 INFO L430 AbstractCegarLoop]: === Iteration 348 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1117038794, now seen corresponding path program 89 times [2021-06-05 05:21:00,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:00,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131572801] [2021-06-05 05:21:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:01,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:01,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131572801] [2021-06-05 05:21:01,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131572801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:01,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241889340] [2021-06-05 05:21:01,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:01,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:01,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:01,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:01,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:01,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:01,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:01,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:01,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:01,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:21:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:01,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241889340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:01,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:01,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:21:01,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077798163] [2021-06-05 05:21:01,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:01,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:01,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:01,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:01,238 INFO L87 Difference]: Start difference. First operand 9949 states and 44742 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:03,259 INFO L93 Difference]: Finished difference Result 11456 states and 50794 transitions. [2021-06-05 05:21:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:21:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:03,283 INFO L225 Difference]: With dead ends: 11456 [2021-06-05 05:21:03,283 INFO L226 Difference]: Without dead ends: 11310 [2021-06-05 05:21:03,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1601.4ms TimeCoverageRelationStatistics Valid=611, Invalid=2929, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:21:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11310 states. [2021-06-05 05:21:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11310 to 9936. [2021-06-05 05:21:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9936 states, 9935 states have (on average 4.498238550578762) internal successors, (44690), 9935 states have internal predecessors, (44690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9936 states to 9936 states and 44690 transitions. [2021-06-05 05:21:03,498 INFO L78 Accepts]: Start accepts. Automaton has 9936 states and 44690 transitions. Word has length 30 [2021-06-05 05:21:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:03,498 INFO L482 AbstractCegarLoop]: Abstraction has 9936 states and 44690 transitions. [2021-06-05 05:21:03,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 9936 states and 44690 transitions. [2021-06-05 05:21:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:03,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:03,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:03,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:03,716 INFO L430 AbstractCegarLoop]: === Iteration 349 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash 341530762, now seen corresponding path program 90 times [2021-06-05 05:21:03,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:03,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055342019] [2021-06-05 05:21:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:03,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:03,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055342019] [2021-06-05 05:21:03,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055342019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:03,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360351198] [2021-06-05 05:21:03,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:03,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:03,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:03,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:04,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:04,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:04,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:21:04,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:21:04,137 INFO L628 ElimStorePlain]: treesize reduction 68, result has 24.4 percent of original size [2021-06-05 05:21:04,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:04,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 05:21:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:04,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360351198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:04,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:04,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:21:04,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116652654] [2021-06-05 05:21:04,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:04,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:04,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:04,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:04,229 INFO L87 Difference]: Start difference. First operand 9936 states and 44690 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:05,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:05,888 INFO L93 Difference]: Finished difference Result 11730 states and 51618 transitions. [2021-06-05 05:21:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:21:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:05,913 INFO L225 Difference]: With dead ends: 11730 [2021-06-05 05:21:05,913 INFO L226 Difference]: Without dead ends: 11391 [2021-06-05 05:21:05,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1119.4ms TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:21:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2021-06-05 05:21:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 9963. [2021-06-05 05:21:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9962 states have (on average 4.498092752459345) internal successors, (44810), 9962 states have internal predecessors, (44810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 44810 transitions. [2021-06-05 05:21:06,183 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 44810 transitions. Word has length 30 [2021-06-05 05:21:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:06,183 INFO L482 AbstractCegarLoop]: Abstraction has 9963 states and 44810 transitions. [2021-06-05 05:21:06,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 44810 transitions. [2021-06-05 05:21:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:06,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:06,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:06,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:06,401 INFO L430 AbstractCegarLoop]: === Iteration 350 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:06,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:06,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1223452426, now seen corresponding path program 33 times [2021-06-05 05:21:06,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:06,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623118614] [2021-06-05 05:21:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:06,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:06,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623118614] [2021-06-05 05:21:06,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623118614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:06,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377515149] [2021-06-05 05:21:06,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:06,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:06,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:06,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:06,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:06,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:06,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:06,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:06,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:21:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:06,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377515149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:06,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:06,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:21:06,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752387256] [2021-06-05 05:21:06,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:06,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:06,729 INFO L87 Difference]: Start difference. First operand 9963 states and 44810 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:08,217 INFO L93 Difference]: Finished difference Result 12053 states and 53034 transitions. [2021-06-05 05:21:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:21:08,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:08,244 INFO L225 Difference]: With dead ends: 12053 [2021-06-05 05:21:08,244 INFO L226 Difference]: Without dead ends: 11739 [2021-06-05 05:21:08,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1014.7ms TimeCoverageRelationStatistics Valid=530, Invalid=2662, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:21:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11739 states. [2021-06-05 05:21:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11739 to 9985. [2021-06-05 05:21:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9985 states, 9984 states have (on average 4.496193910256411) internal successors, (44890), 9984 states have internal predecessors, (44890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9985 states to 9985 states and 44890 transitions. [2021-06-05 05:21:08,438 INFO L78 Accepts]: Start accepts. Automaton has 9985 states and 44890 transitions. Word has length 30 [2021-06-05 05:21:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:08,438 INFO L482 AbstractCegarLoop]: Abstraction has 9985 states and 44890 transitions. [2021-06-05 05:21:08,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 9985 states and 44890 transitions. [2021-06-05 05:21:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:08,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:08,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:08,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-06-05 05:21:08,656 INFO L430 AbstractCegarLoop]: === Iteration 351 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash -519083462, now seen corresponding path program 34 times [2021-06-05 05:21:08,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:08,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055105638] [2021-06-05 05:21:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:08,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:08,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055105638] [2021-06-05 05:21:08,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055105638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:08,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391405919] [2021-06-05 05:21:08,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:08,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:08,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:08,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:08,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:08,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:08,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:08,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:21:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:08,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391405919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:08,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:08,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:21:08,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968818337] [2021-06-05 05:21:08,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:21:08,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:08,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:21:08,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:21:08,989 INFO L87 Difference]: Start difference. First operand 9985 states and 44890 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:10,538 INFO L93 Difference]: Finished difference Result 11647 states and 51501 transitions. [2021-06-05 05:21:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:21:10,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:10,562 INFO L225 Difference]: With dead ends: 11647 [2021-06-05 05:21:10,562 INFO L226 Difference]: Without dead ends: 11511 [2021-06-05 05:21:10,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1212.2ms TimeCoverageRelationStatistics Valid=413, Invalid=2239, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:21:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11511 states. [2021-06-05 05:21:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11511 to 9999. [2021-06-05 05:21:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 4.496699339867973) internal successors, (44958), 9998 states have internal predecessors, (44958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 44958 transitions. [2021-06-05 05:21:10,755 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 44958 transitions. Word has length 30 [2021-06-05 05:21:10,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:10,755 INFO L482 AbstractCegarLoop]: Abstraction has 9999 states and 44958 transitions. [2021-06-05 05:21:10,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 44958 transitions. [2021-06-05 05:21:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:10,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:10,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:10,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:10,971 INFO L430 AbstractCegarLoop]: === Iteration 352 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:10,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1051840444, now seen corresponding path program 35 times [2021-06-05 05:21:10,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:10,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143097684] [2021-06-05 05:21:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:11,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:11,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143097684] [2021-06-05 05:21:11,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143097684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:11,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080438462] [2021-06-05 05:21:11,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:11,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:21:11,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:11,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:11,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:11,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:11,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:11,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:11,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:11,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 05:21:11,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:11,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:11,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:11,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:91 [2021-06-05 05:21:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:11,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080438462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:11,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:11,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 05:21:11,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136741741] [2021-06-05 05:21:11,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:11,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:11,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:11,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:11,392 INFO L87 Difference]: Start difference. First operand 9999 states and 44958 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:12,487 INFO L93 Difference]: Finished difference Result 11008 states and 48963 transitions. [2021-06-05 05:21:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:21:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:12,512 INFO L225 Difference]: With dead ends: 11008 [2021-06-05 05:21:12,512 INFO L226 Difference]: Without dead ends: 10933 [2021-06-05 05:21:12,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 816.7ms TimeCoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:21:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10933 states. [2021-06-05 05:21:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10933 to 10018. [2021-06-05 05:21:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10018 states, 10017 states have (on average 4.495158231007288) internal successors, (45028), 10017 states have internal predecessors, (45028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10018 states to 10018 states and 45028 transitions. [2021-06-05 05:21:12,700 INFO L78 Accepts]: Start accepts. Automaton has 10018 states and 45028 transitions. Word has length 30 [2021-06-05 05:21:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:12,700 INFO L482 AbstractCegarLoop]: Abstraction has 10018 states and 45028 transitions. [2021-06-05 05:21:12,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 10018 states and 45028 transitions. [2021-06-05 05:21:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:12,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:12,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:12,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:12,920 INFO L430 AbstractCegarLoop]: === Iteration 353 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -170306532, now seen corresponding path program 36 times [2021-06-05 05:21:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:12,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013404579] [2021-06-05 05:21:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:13,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013404579] [2021-06-05 05:21:13,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013404579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348166345] [2021-06-05 05:21:13,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:13,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:21:13,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:13,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:21:13,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:13,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:13,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:13,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:21:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:13,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348166345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:13,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:13,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:13,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804453013] [2021-06-05 05:21:13,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:13,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:13,323 INFO L87 Difference]: Start difference. First operand 10018 states and 45028 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:15,240 INFO L93 Difference]: Finished difference Result 11856 states and 52141 transitions. [2021-06-05 05:21:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:21:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:15,266 INFO L225 Difference]: With dead ends: 11856 [2021-06-05 05:21:15,266 INFO L226 Difference]: Without dead ends: 11547 [2021-06-05 05:21:15,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1440.9ms TimeCoverageRelationStatistics Valid=556, Invalid=2984, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:21:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11547 states. [2021-06-05 05:21:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11547 to 10005. [2021-06-05 05:21:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 4.495701719312275) internal successors, (44975), 10004 states have internal predecessors, (44975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 44975 transitions. [2021-06-05 05:21:15,459 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 44975 transitions. Word has length 30 [2021-06-05 05:21:15,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:15,459 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 44975 transitions. [2021-06-05 05:21:15,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:15,459 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 44975 transitions. [2021-06-05 05:21:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:15,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:15,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:15,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable841,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:15,677 INFO L430 AbstractCegarLoop]: === Iteration 354 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1209309202, now seen corresponding path program 91 times [2021-06-05 05:21:15,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:15,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588767238] [2021-06-05 05:21:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:15,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:15,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588767238] [2021-06-05 05:21:15,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588767238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:15,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733249516] [2021-06-05 05:21:15,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:15,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:15,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:15,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:15,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:15,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:21:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:16,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733249516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:16,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:16,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:21:16,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853449028] [2021-06-05 05:21:16,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:21:16,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:16,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:21:16,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:21:16,049 INFO L87 Difference]: Start difference. First operand 10005 states and 44975 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:17,994 INFO L93 Difference]: Finished difference Result 11411 states and 50619 transitions. [2021-06-05 05:21:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:21:17,995 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:18,019 INFO L225 Difference]: With dead ends: 11411 [2021-06-05 05:21:18,019 INFO L226 Difference]: Without dead ends: 11297 [2021-06-05 05:21:18,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1486.2ms TimeCoverageRelationStatistics Valid=464, Invalid=2506, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:21:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11297 states. [2021-06-05 05:21:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11297 to 10021. [2021-06-05 05:21:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10021 states, 10020 states have (on average 4.494810379241517) internal successors, (45038), 10020 states have internal predecessors, (45038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10021 states to 10021 states and 45038 transitions. [2021-06-05 05:21:18,210 INFO L78 Accepts]: Start accepts. Automaton has 10021 states and 45038 transitions. Word has length 30 [2021-06-05 05:21:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:18,210 INFO L482 AbstractCegarLoop]: Abstraction has 10021 states and 45038 transitions. [2021-06-05 05:21:18,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10021 states and 45038 transitions. [2021-06-05 05:21:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:18,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:18,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:18,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 05:21:18,428 INFO L430 AbstractCegarLoop]: === Iteration 355 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:18,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1522835598, now seen corresponding path program 92 times [2021-06-05 05:21:18,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:18,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177359415] [2021-06-05 05:21:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:18,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:18,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177359415] [2021-06-05 05:21:18,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177359415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:18,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756126488] [2021-06-05 05:21:18,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:18,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:18,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:18,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:21:18,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:18,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:18,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:18,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:21:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:18,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756126488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:18,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:18,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:18,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802930818] [2021-06-05 05:21:18,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:18,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:18,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:18,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:18,852 INFO L87 Difference]: Start difference. First operand 10021 states and 45038 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:20,961 INFO L93 Difference]: Finished difference Result 11514 states and 50855 transitions. [2021-06-05 05:21:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:21:20,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:20,986 INFO L225 Difference]: With dead ends: 11514 [2021-06-05 05:21:20,986 INFO L226 Difference]: Without dead ends: 11218 [2021-06-05 05:21:20,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1634.7ms TimeCoverageRelationStatistics Valid=555, Invalid=2985, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:21:20,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2021-06-05 05:21:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 10019. [2021-06-05 05:21:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10019 states, 10018 states have (on average 4.49490916350569) internal successors, (45030), 10018 states have internal predecessors, (45030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10019 states to 10019 states and 45030 transitions. [2021-06-05 05:21:21,254 INFO L78 Accepts]: Start accepts. Automaton has 10019 states and 45030 transitions. Word has length 30 [2021-06-05 05:21:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:21,254 INFO L482 AbstractCegarLoop]: Abstraction has 10019 states and 45030 transitions. [2021-06-05 05:21:21,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 10019 states and 45030 transitions. [2021-06-05 05:21:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:21,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:21,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:21,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:21,471 INFO L430 AbstractCegarLoop]: === Iteration 356 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash 87255124, now seen corresponding path program 93 times [2021-06-05 05:21:21,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:21,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342742499] [2021-06-05 05:21:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:21,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:21,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342742499] [2021-06-05 05:21:21,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342742499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:21,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13178618] [2021-06-05 05:21:21,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:21,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:21:21,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:21,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:21,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:21,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:21,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:21:21,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:21,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:21,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:21,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:21:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:21,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13178618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:21,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:21,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:21,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806198550] [2021-06-05 05:21:21,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:21,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:21,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:21,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:21,905 INFO L87 Difference]: Start difference. First operand 10019 states and 45030 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:24,078 INFO L93 Difference]: Finished difference Result 11424 states and 50460 transitions. [2021-06-05 05:21:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:21:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:24,104 INFO L225 Difference]: With dead ends: 11424 [2021-06-05 05:21:24,104 INFO L226 Difference]: Without dead ends: 11176 [2021-06-05 05:21:24,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1596.7ms TimeCoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:21:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11176 states. [2021-06-05 05:21:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11176 to 10022. [2021-06-05 05:21:24,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 4.49496058277617) internal successors, (45044), 10021 states have internal predecessors, (45044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 45044 transitions. [2021-06-05 05:21:24,300 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 45044 transitions. Word has length 30 [2021-06-05 05:21:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:24,300 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 45044 transitions. [2021-06-05 05:21:24,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 45044 transitions. [2021-06-05 05:21:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:24,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:24,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:24,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable848 [2021-06-05 05:21:24,517 INFO L430 AbstractCegarLoop]: === Iteration 357 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash 751657866, now seen corresponding path program 94 times [2021-06-05 05:21:24,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:24,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883925132] [2021-06-05 05:21:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:24,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:24,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883925132] [2021-06-05 05:21:24,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883925132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:24,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166083716] [2021-06-05 05:21:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:24,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:24,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:24,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:24,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:24,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:24,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:24,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:24,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:21:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:24,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166083716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:24,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:24,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:21:24,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934796343] [2021-06-05 05:21:24,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:21:24,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:24,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:21:24,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:21:24,842 INFO L87 Difference]: Start difference. First operand 10022 states and 45044 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:25,145 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 05:21:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:26,597 INFO L93 Difference]: Finished difference Result 11362 states and 50380 transitions. [2021-06-05 05:21:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:21:26,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:26,624 INFO L225 Difference]: With dead ends: 11362 [2021-06-05 05:21:26,624 INFO L226 Difference]: Without dead ends: 11251 [2021-06-05 05:21:26,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1388.6ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:21:26,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11251 states. [2021-06-05 05:21:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11251 to 10041. [2021-06-05 05:21:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10041 states, 10040 states have (on average 4.493824701195219) internal successors, (45118), 10040 states have internal predecessors, (45118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10041 states to 10041 states and 45118 transitions. [2021-06-05 05:21:26,830 INFO L78 Accepts]: Start accepts. Automaton has 10041 states and 45118 transitions. Word has length 30 [2021-06-05 05:21:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:26,830 INFO L482 AbstractCegarLoop]: Abstraction has 10041 states and 45118 transitions. [2021-06-05 05:21:26,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 10041 states and 45118 transitions. [2021-06-05 05:21:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:26,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:26,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:27,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-05 05:21:27,048 INFO L430 AbstractCegarLoop]: === Iteration 358 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:27,048 INFO L82 PathProgramCache]: Analyzing trace with hash -631545590, now seen corresponding path program 95 times [2021-06-05 05:21:27,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:27,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941969668] [2021-06-05 05:21:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:27,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941969668] [2021-06-05 05:21:27,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941969668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210142494] [2021-06-05 05:21:27,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:27,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:27,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:27,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:27,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:27,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:27,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:27,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:27,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:27,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:21:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:27,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210142494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:27,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:27,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:21:27,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244557244] [2021-06-05 05:21:27,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:27,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:27,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:27,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:27,415 INFO L87 Difference]: Start difference. First operand 10041 states and 45118 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:29,532 INFO L93 Difference]: Finished difference Result 11575 states and 51275 transitions. [2021-06-05 05:21:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:21:29,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:29,558 INFO L225 Difference]: With dead ends: 11575 [2021-06-05 05:21:29,558 INFO L226 Difference]: Without dead ends: 11442 [2021-06-05 05:21:29,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1583.0ms TimeCoverageRelationStatistics Valid=520, Invalid=2450, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:21:29,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11442 states. [2021-06-05 05:21:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11442 to 10046. [2021-06-05 05:21:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10046 states, 10045 states have (on average 4.493479342956695) internal successors, (45137), 10045 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10046 states to 10046 states and 45137 transitions. [2021-06-05 05:21:29,844 INFO L78 Accepts]: Start accepts. Automaton has 10046 states and 45137 transitions. Word has length 30 [2021-06-05 05:21:29,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:29,844 INFO L482 AbstractCegarLoop]: Abstraction has 10046 states and 45137 transitions. [2021-06-05 05:21:29,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 10046 states and 45137 transitions. [2021-06-05 05:21:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:29,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:29,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:30,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:30,061 INFO L430 AbstractCegarLoop]: === Iteration 359 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:30,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1904131044, now seen corresponding path program 96 times [2021-06-05 05:21:30,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:30,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660499412] [2021-06-05 05:21:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:30,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:30,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660499412] [2021-06-05 05:21:30,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660499412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:30,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178295205] [2021-06-05 05:21:30,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:30,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:30,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:30,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:21:30,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:30,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:30,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:30,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:21:30,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:30,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:30,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:30,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 05:21:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:30,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178295205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:30,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:30,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:21:30,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950962511] [2021-06-05 05:21:30,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:30,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:30,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:30,507 INFO L87 Difference]: Start difference. First operand 10046 states and 45137 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:32,725 INFO L93 Difference]: Finished difference Result 11643 states and 51360 transitions. [2021-06-05 05:21:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:21:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:32,750 INFO L225 Difference]: With dead ends: 11643 [2021-06-05 05:21:32,750 INFO L226 Difference]: Without dead ends: 11435 [2021-06-05 05:21:32,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1620.5ms TimeCoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:21:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11435 states. [2021-06-05 05:21:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11435 to 10045. [2021-06-05 05:21:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.493628036638789) internal successors, (45134), 10044 states have internal predecessors, (45134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45134 transitions. [2021-06-05 05:21:32,941 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45134 transitions. Word has length 30 [2021-06-05 05:21:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:32,941 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45134 transitions. [2021-06-05 05:21:32,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45134 transitions. [2021-06-05 05:21:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:32,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:32,957 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:33,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-06-05 05:21:33,158 INFO L430 AbstractCegarLoop]: === Iteration 360 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2093250062, now seen corresponding path program 97 times [2021-06-05 05:21:33,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:33,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388813339] [2021-06-05 05:21:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:33,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:33,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388813339] [2021-06-05 05:21:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388813339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:33,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509691050] [2021-06-05 05:21:33,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:33,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:33,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:33,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:33,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:33,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:33,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:21:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:33,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509691050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:33,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:33,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:21:33,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112539226] [2021-06-05 05:21:33,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:33,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:33,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:33,529 INFO L87 Difference]: Start difference. First operand 10045 states and 45134 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:35,503 INFO L93 Difference]: Finished difference Result 11865 states and 52398 transitions. [2021-06-05 05:21:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:21:35,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:35,529 INFO L225 Difference]: With dead ends: 11865 [2021-06-05 05:21:35,529 INFO L226 Difference]: Without dead ends: 11732 [2021-06-05 05:21:35,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1274.7ms TimeCoverageRelationStatistics Valid=425, Invalid=2227, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:21:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11732 states. [2021-06-05 05:21:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11732 to 10093. [2021-06-05 05:21:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10093 states, 10092 states have (on average 4.492667459373761) internal successors, (45340), 10092 states have internal predecessors, (45340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10093 states to 10093 states and 45340 transitions. [2021-06-05 05:21:35,726 INFO L78 Accepts]: Start accepts. Automaton has 10093 states and 45340 transitions. Word has length 30 [2021-06-05 05:21:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:35,726 INFO L482 AbstractCegarLoop]: Abstraction has 10093 states and 45340 transitions. [2021-06-05 05:21:35,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 10093 states and 45340 transitions. [2021-06-05 05:21:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:35,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:35,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:35,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable858,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:35,944 INFO L430 AbstractCegarLoop]: === Iteration 361 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:35,944 INFO L82 PathProgramCache]: Analyzing trace with hash 636734046, now seen corresponding path program 37 times [2021-06-05 05:21:35,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:35,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493372494] [2021-06-05 05:21:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:36,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:36,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493372494] [2021-06-05 05:21:36,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493372494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:36,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843431754] [2021-06-05 05:21:36,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:36,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:36,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:36,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:36,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:36,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:36,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:36,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:21:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:36,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843431754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:36,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:36,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:21:36,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086770145] [2021-06-05 05:21:36,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:36,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:36,269 INFO L87 Difference]: Start difference. First operand 10093 states and 45340 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:37,948 INFO L93 Difference]: Finished difference Result 12325 states and 54104 transitions. [2021-06-05 05:21:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:21:37,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:37,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:37,975 INFO L225 Difference]: With dead ends: 12325 [2021-06-05 05:21:37,975 INFO L226 Difference]: Without dead ends: 12027 [2021-06-05 05:21:37,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1052.8ms TimeCoverageRelationStatistics Valid=528, Invalid=2664, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:21:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12027 states. [2021-06-05 05:21:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12027 to 10126. [2021-06-05 05:21:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10126 states, 10125 states have (on average 4.489481481481482) internal successors, (45456), 10125 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10126 states to 10126 states and 45456 transitions. [2021-06-05 05:21:38,171 INFO L78 Accepts]: Start accepts. Automaton has 10126 states and 45456 transitions. Word has length 30 [2021-06-05 05:21:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:38,171 INFO L482 AbstractCegarLoop]: Abstraction has 10126 states and 45456 transitions. [2021-06-05 05:21:38,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 10126 states and 45456 transitions. [2021-06-05 05:21:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:38,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:38,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:38,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:38,389 INFO L430 AbstractCegarLoop]: === Iteration 362 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:38,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:38,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1634437686, now seen corresponding path program 98 times [2021-06-05 05:21:38,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:38,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195816658] [2021-06-05 05:21:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:38,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:38,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195816658] [2021-06-05 05:21:38,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195816658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:38,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510074677] [2021-06-05 05:21:38,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:38,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:38,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:38,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:38,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:38,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:38,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:21:38,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:38,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:38,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:38,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 05:21:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:38,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510074677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:38,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:38,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:38,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273342902] [2021-06-05 05:21:38,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:38,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:38,808 INFO L87 Difference]: Start difference. First operand 10126 states and 45456 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:40,702 INFO L93 Difference]: Finished difference Result 11743 states and 51740 transitions. [2021-06-05 05:21:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:21:40,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:40,726 INFO L225 Difference]: With dead ends: 11743 [2021-06-05 05:21:40,727 INFO L226 Difference]: Without dead ends: 11461 [2021-06-05 05:21:40,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1360.3ms TimeCoverageRelationStatistics Valid=473, Invalid=2607, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:21:40,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11461 states. [2021-06-05 05:21:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11461 to 10146. [2021-06-05 05:21:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 10145 states have (on average 4.488122227698374) internal successors, (45532), 10145 states have internal predecessors, (45532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 45532 transitions. [2021-06-05 05:21:40,922 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 45532 transitions. Word has length 30 [2021-06-05 05:21:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:40,922 INFO L482 AbstractCegarLoop]: Abstraction has 10146 states and 45532 transitions. [2021-06-05 05:21:40,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 45532 transitions. [2021-06-05 05:21:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:40,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:40,940 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:41,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-06-05 05:21:41,141 INFO L430 AbstractCegarLoop]: === Iteration 363 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:41,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:41,141 INFO L82 PathProgramCache]: Analyzing trace with hash -124852976, now seen corresponding path program 99 times [2021-06-05 05:21:41,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:41,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858067488] [2021-06-05 05:21:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:41,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858067488] [2021-06-05 05:21:41,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858067488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287000246] [2021-06-05 05:21:41,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:41,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:41,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:41,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:41,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:41,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:21:41,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:41,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:41,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:41,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 05:21:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:41,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287000246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:41,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:41,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:41,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028757064] [2021-06-05 05:21:41,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:41,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:41,548 INFO L87 Difference]: Start difference. First operand 10146 states and 45532 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:43,929 INFO L93 Difference]: Finished difference Result 11849 states and 52116 transitions. [2021-06-05 05:21:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:21:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:43,955 INFO L225 Difference]: With dead ends: 11849 [2021-06-05 05:21:43,955 INFO L226 Difference]: Without dead ends: 11555 [2021-06-05 05:21:43,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1745.8ms TimeCoverageRelationStatistics Valid=633, Invalid=3527, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:21:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11555 states. [2021-06-05 05:21:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11555 to 10148. [2021-06-05 05:21:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10148 states, 10147 states have (on average 4.487533261062383) internal successors, (45535), 10147 states have internal predecessors, (45535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10148 states to 10148 states and 45535 transitions. [2021-06-05 05:21:44,211 INFO L78 Accepts]: Start accepts. Automaton has 10148 states and 45535 transitions. Word has length 30 [2021-06-05 05:21:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:44,211 INFO L482 AbstractCegarLoop]: Abstraction has 10148 states and 45535 transitions. [2021-06-05 05:21:44,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 10148 states and 45535 transitions. [2021-06-05 05:21:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:44,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:44,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:44,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:44,428 INFO L430 AbstractCegarLoop]: === Iteration 364 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:44,429 INFO L82 PathProgramCache]: Analyzing trace with hash 20051996, now seen corresponding path program 88 times [2021-06-05 05:21:44,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:44,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694586693] [2021-06-05 05:21:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:44,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:44,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694586693] [2021-06-05 05:21:44,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694586693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:44,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259102249] [2021-06-05 05:21:44,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:44,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:44,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:44,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:44,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:44,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:44,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:44,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:44,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:44,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:21:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:44,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259102249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:44,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:44,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:21:44,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361335940] [2021-06-05 05:21:44,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:21:44,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:44,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:21:44,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:21:44,742 INFO L87 Difference]: Start difference. First operand 10148 states and 45535 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:46,842 INFO L93 Difference]: Finished difference Result 11318 states and 50249 transitions. [2021-06-05 05:21:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:21:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:46,867 INFO L225 Difference]: With dead ends: 11318 [2021-06-05 05:21:46,868 INFO L226 Difference]: Without dead ends: 11220 [2021-06-05 05:21:46,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1577.9ms TimeCoverageRelationStatistics Valid=497, Invalid=2583, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:21:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11220 states. [2021-06-05 05:21:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11220 to 10174. [2021-06-05 05:21:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10174 states, 10173 states have (on average 4.486877027425538) internal successors, (45645), 10173 states have internal predecessors, (45645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10174 states to 10174 states and 45645 transitions. [2021-06-05 05:21:47,064 INFO L78 Accepts]: Start accepts. Automaton has 10174 states and 45645 transitions. Word has length 30 [2021-06-05 05:21:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:47,064 INFO L482 AbstractCegarLoop]: Abstraction has 10174 states and 45645 transitions. [2021-06-05 05:21:47,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10174 states and 45645 transitions. [2021-06-05 05:21:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:47,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:47,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:47,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-06-05 05:21:47,285 INFO L430 AbstractCegarLoop]: === Iteration 365 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash -436233022, now seen corresponding path program 89 times [2021-06-05 05:21:47,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:47,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371495361] [2021-06-05 05:21:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:47,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:47,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371495361] [2021-06-05 05:21:47,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371495361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:47,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777743803] [2021-06-05 05:21:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:47,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:47,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:47,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:47,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:47,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:47,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:47,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:47,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:47,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:21:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:47,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777743803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:47,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:47,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:21:47,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189033109] [2021-06-05 05:21:47,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:21:47,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:21:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:21:47,609 INFO L87 Difference]: Start difference. First operand 10174 states and 45645 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:49,331 INFO L93 Difference]: Finished difference Result 11213 states and 49842 transitions. [2021-06-05 05:21:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:21:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:49,356 INFO L225 Difference]: With dead ends: 11213 [2021-06-05 05:21:49,357 INFO L226 Difference]: Without dead ends: 11110 [2021-06-05 05:21:49,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1258.8ms TimeCoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:21:49,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11110 states. [2021-06-05 05:21:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11110 to 10171. [2021-06-05 05:21:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10171 states, 10170 states have (on average 4.486529006882989) internal successors, (45628), 10170 states have internal predecessors, (45628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10171 states to 10171 states and 45628 transitions. [2021-06-05 05:21:49,549 INFO L78 Accepts]: Start accepts. Automaton has 10171 states and 45628 transitions. Word has length 30 [2021-06-05 05:21:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:49,549 INFO L482 AbstractCegarLoop]: Abstraction has 10171 states and 45628 transitions. [2021-06-05 05:21:49,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 10171 states and 45628 transitions. [2021-06-05 05:21:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:49,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:49,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:49,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:49,766 INFO L430 AbstractCegarLoop]: === Iteration 366 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1026314068, now seen corresponding path program 13 times [2021-06-05 05:21:49,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:49,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375254752] [2021-06-05 05:21:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:49,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:49,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375254752] [2021-06-05 05:21:49,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375254752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:49,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290905769] [2021-06-05 05:21:49,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:49,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:50,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:50,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:50,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:50,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:50,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:21:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:50,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290905769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:50,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:50,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:21:50,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787505986] [2021-06-05 05:21:50,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:21:50,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:50,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:21:50,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:21:50,086 INFO L87 Difference]: Start difference. First operand 10171 states and 45628 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:51,806 INFO L93 Difference]: Finished difference Result 11591 states and 51303 transitions. [2021-06-05 05:21:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:21:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:51,833 INFO L225 Difference]: With dead ends: 11591 [2021-06-05 05:21:51,833 INFO L226 Difference]: Without dead ends: 11473 [2021-06-05 05:21:51,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1237.8ms TimeCoverageRelationStatistics Valid=488, Invalid=2482, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:21:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11473 states. [2021-06-05 05:21:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11473 to 10183. [2021-06-05 05:21:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10183 states, 10182 states have (on average 4.486152032999411) internal successors, (45678), 10182 states have internal predecessors, (45678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10183 states to 10183 states and 45678 transitions. [2021-06-05 05:21:52,034 INFO L78 Accepts]: Start accepts. Automaton has 10183 states and 45678 transitions. Word has length 30 [2021-06-05 05:21:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:52,034 INFO L482 AbstractCegarLoop]: Abstraction has 10183 states and 45678 transitions. [2021-06-05 05:21:52,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand 10183 states and 45678 transitions. [2021-06-05 05:21:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:52,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:52,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:52,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable868 [2021-06-05 05:21:52,252 INFO L430 AbstractCegarLoop]: === Iteration 367 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -405830002, now seen corresponding path program 14 times [2021-06-05 05:21:52,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:52,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725126125] [2021-06-05 05:21:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:52,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:52,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725126125] [2021-06-05 05:21:52,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725126125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:52,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588097790] [2021-06-05 05:21:52,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:52,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:52,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:52,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:52,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:52,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:52,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:21:52,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:52,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:52,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:52,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:21:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:52,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588097790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:52,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:52,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:52,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620600202] [2021-06-05 05:21:52,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:52,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:52,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:52,647 INFO L87 Difference]: Start difference. First operand 10183 states and 45678 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:55,527 INFO L93 Difference]: Finished difference Result 11682 states and 51569 transitions. [2021-06-05 05:21:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:21:55,527 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:55,552 INFO L225 Difference]: With dead ends: 11682 [2021-06-05 05:21:55,552 INFO L226 Difference]: Without dead ends: 11472 [2021-06-05 05:21:55,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 2105.4ms TimeCoverageRelationStatistics Valid=701, Invalid=4999, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:21:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2021-06-05 05:21:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 10171. [2021-06-05 05:21:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10171 states, 10170 states have (on average 4.486135693215339) internal successors, (45624), 10170 states have internal predecessors, (45624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10171 states to 10171 states and 45624 transitions. [2021-06-05 05:21:55,749 INFO L78 Accepts]: Start accepts. Automaton has 10171 states and 45624 transitions. Word has length 30 [2021-06-05 05:21:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:55,749 INFO L482 AbstractCegarLoop]: Abstraction has 10171 states and 45624 transitions. [2021-06-05 05:21:55,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 10171 states and 45624 transitions. [2021-06-05 05:21:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:55,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:55,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:55,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable869,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:55,967 INFO L430 AbstractCegarLoop]: === Iteration 368 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1089555344, now seen corresponding path program 90 times [2021-06-05 05:21:55,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:55,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32568690] [2021-06-05 05:21:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:56,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:56,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32568690] [2021-06-05 05:21:56,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32568690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:56,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496818483] [2021-06-05 05:21:56,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:56,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:21:56,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:56,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:56,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:56,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:56,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:56,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:56,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:56,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:21:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:56,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496818483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:56,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:56,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:56,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321458527] [2021-06-05 05:21:56,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:56,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:56,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:56,351 INFO L87 Difference]: Start difference. First operand 10171 states and 45624 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:58,315 INFO L93 Difference]: Finished difference Result 11453 states and 50728 transitions. [2021-06-05 05:21:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:21:58,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:21:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:58,341 INFO L225 Difference]: With dead ends: 11453 [2021-06-05 05:21:58,341 INFO L226 Difference]: Without dead ends: 11346 [2021-06-05 05:21:58,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1402.1ms TimeCoverageRelationStatistics Valid=494, Invalid=2476, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:21:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11346 states. [2021-06-05 05:21:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11346 to 10179. [2021-06-05 05:21:58,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10179 states, 10178 states have (on average 4.485557083906465) internal successors, (45654), 10178 states have internal predecessors, (45654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10179 states to 10179 states and 45654 transitions. [2021-06-05 05:21:58,536 INFO L78 Accepts]: Start accepts. Automaton has 10179 states and 45654 transitions. Word has length 30 [2021-06-05 05:21:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:58,536 INFO L482 AbstractCegarLoop]: Abstraction has 10179 states and 45654 transitions. [2021-06-05 05:21:58,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 10179 states and 45654 transitions. [2021-06-05 05:21:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:21:58,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:58,553 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:58,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 05:21:58,753 INFO L430 AbstractCegarLoop]: === Iteration 369 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:21:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1955210796, now seen corresponding path program 15 times [2021-06-05 05:21:58,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:58,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482618200] [2021-06-05 05:21:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:58,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:58,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482618200] [2021-06-05 05:21:58,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482618200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:58,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039031883] [2021-06-05 05:21:58,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:58,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:21:58,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:59,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:59,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:59,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:59,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:59,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:21:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:59,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039031883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:59,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:59,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:21:59,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594006948] [2021-06-05 05:21:59,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:59,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:59,158 INFO L87 Difference]: Start difference. First operand 10179 states and 45654 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:01,068 INFO L93 Difference]: Finished difference Result 11695 states and 51628 transitions. [2021-06-05 05:22:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:22:01,069 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:01,093 INFO L225 Difference]: With dead ends: 11695 [2021-06-05 05:22:01,093 INFO L226 Difference]: Without dead ends: 11463 [2021-06-05 05:22:01,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1470.7ms TimeCoverageRelationStatistics Valid=589, Invalid=3071, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:22:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11463 states. [2021-06-05 05:22:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11463 to 10167. [2021-06-05 05:22:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10167 states, 10166 states have (on average 4.485933503836317) internal successors, (45604), 10166 states have internal predecessors, (45604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10167 states to 10167 states and 45604 transitions. [2021-06-05 05:22:01,289 INFO L78 Accepts]: Start accepts. Automaton has 10167 states and 45604 transitions. Word has length 30 [2021-06-05 05:22:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:01,289 INFO L482 AbstractCegarLoop]: Abstraction has 10167 states and 45604 transitions. [2021-06-05 05:22:01,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 10167 states and 45604 transitions. [2021-06-05 05:22:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:01,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:01,306 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:01,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable872,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:01,507 INFO L430 AbstractCegarLoop]: === Iteration 370 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:01,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:01,507 INFO L82 PathProgramCache]: Analyzing trace with hash -385744808, now seen corresponding path program 91 times [2021-06-05 05:22:01,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:01,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733058880] [2021-06-05 05:22:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:01,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:01,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733058880] [2021-06-05 05:22:01,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733058880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:01,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229857870] [2021-06-05 05:22:01,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:01,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:01,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:01,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:01,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:01,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:01,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:01,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:22:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:01,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229857870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:01,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:01,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:22:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602497433] [2021-06-05 05:22:01,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:22:01,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:22:01,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:22:01,817 INFO L87 Difference]: Start difference. First operand 10167 states and 45604 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:03,373 INFO L93 Difference]: Finished difference Result 11252 states and 49989 transitions. [2021-06-05 05:22:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:22:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:03,398 INFO L225 Difference]: With dead ends: 11252 [2021-06-05 05:22:03,399 INFO L226 Difference]: Without dead ends: 11154 [2021-06-05 05:22:03,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1097.7ms TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:22:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-06-05 05:22:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 10179. [2021-06-05 05:22:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10179 states, 10178 states have (on average 4.485753586166241) internal successors, (45656), 10178 states have internal predecessors, (45656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10179 states to 10179 states and 45656 transitions. [2021-06-05 05:22:03,604 INFO L78 Accepts]: Start accepts. Automaton has 10179 states and 45656 transitions. Word has length 30 [2021-06-05 05:22:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:03,604 INFO L482 AbstractCegarLoop]: Abstraction has 10179 states and 45656 transitions. [2021-06-05 05:22:03,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10179 states and 45656 transitions. [2021-06-05 05:22:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:03,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:03,622 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:03,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-06-05 05:22:03,822 INFO L430 AbstractCegarLoop]: === Iteration 371 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash -842029826, now seen corresponding path program 92 times [2021-06-05 05:22:03,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:03,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776686476] [2021-06-05 05:22:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:03,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:03,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776686476] [2021-06-05 05:22:03,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776686476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:03,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304750649] [2021-06-05 05:22:03,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:03,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:03,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:04,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:04,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:04,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:04,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:04,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:22:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:04,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304750649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:04,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:04,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:22:04,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229503066] [2021-06-05 05:22:04,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:22:04,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:04,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:22:04,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:22:04,119 INFO L87 Difference]: Start difference. First operand 10179 states and 45656 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:05,309 INFO L93 Difference]: Finished difference Result 11192 states and 49749 transitions. [2021-06-05 05:22:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:22:05,309 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:05,336 INFO L225 Difference]: With dead ends: 11192 [2021-06-05 05:22:05,336 INFO L226 Difference]: Without dead ends: 11089 [2021-06-05 05:22:05,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 889.2ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:22:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11089 states. [2021-06-05 05:22:05,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11089 to 10173. [2021-06-05 05:22:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10173 states, 10172 states have (on average 4.485646873771136) internal successors, (45628), 10172 states have internal predecessors, (45628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10173 states to 10173 states and 45628 transitions. [2021-06-05 05:22:05,548 INFO L78 Accepts]: Start accepts. Automaton has 10173 states and 45628 transitions. Word has length 30 [2021-06-05 05:22:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:05,548 INFO L482 AbstractCegarLoop]: Abstraction has 10173 states and 45628 transitions. [2021-06-05 05:22:05,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 10173 states and 45628 transitions. [2021-06-05 05:22:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:05,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:05,566 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:05,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:05,767 INFO L430 AbstractCegarLoop]: === Iteration 372 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:05,767 INFO L82 PathProgramCache]: Analyzing trace with hash 910819518, now seen corresponding path program 93 times [2021-06-05 05:22:05,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:05,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123574622] [2021-06-05 05:22:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:05,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:05,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123574622] [2021-06-05 05:22:05,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123574622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:05,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245101383] [2021-06-05 05:22:05,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:05,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:05,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:05,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:06,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:06,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:22:06,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:06,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:06,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:06,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:22:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:06,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245101383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:06,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:06,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:22:06,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542702473] [2021-06-05 05:22:06,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:06,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:06,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:06,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:06,147 INFO L87 Difference]: Start difference. First operand 10173 states and 45628 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:07,835 INFO L93 Difference]: Finished difference Result 11230 states and 49841 transitions. [2021-06-05 05:22:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:22:07,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:07,860 INFO L225 Difference]: With dead ends: 11230 [2021-06-05 05:22:07,860 INFO L226 Difference]: Without dead ends: 11117 [2021-06-05 05:22:07,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1307.0ms TimeCoverageRelationStatistics Valid=387, Invalid=2063, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:22:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11117 states. [2021-06-05 05:22:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11117 to 10180. [2021-06-05 05:22:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10180 states, 10179 states have (on average 4.485018174673347) internal successors, (45653), 10179 states have internal predecessors, (45653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10180 states to 10180 states and 45653 transitions. [2021-06-05 05:22:08,051 INFO L78 Accepts]: Start accepts. Automaton has 10180 states and 45653 transitions. Word has length 30 [2021-06-05 05:22:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:08,051 INFO L482 AbstractCegarLoop]: Abstraction has 10180 states and 45653 transitions. [2021-06-05 05:22:08,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 10180 states and 45653 transitions. [2021-06-05 05:22:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:08,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:08,068 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:08,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable875,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:08,269 INFO L430 AbstractCegarLoop]: === Iteration 373 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:08,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:08,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1298378960, now seen corresponding path program 94 times [2021-06-05 05:22:08,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:08,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297676627] [2021-06-05 05:22:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:08,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:08,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297676627] [2021-06-05 05:22:08,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297676627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:08,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136253561] [2021-06-05 05:22:08,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:08,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:08,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:08,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:08,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:08,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:08,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:08,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:08,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:08,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:22:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:08,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136253561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:08,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:08,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:08,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352045277] [2021-06-05 05:22:08,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:08,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:08,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:08,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:08,581 INFO L87 Difference]: Start difference. First operand 10180 states and 45653 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:10,156 INFO L93 Difference]: Finished difference Result 11323 states and 50250 transitions. [2021-06-05 05:22:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:22:10,157 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:10,180 INFO L225 Difference]: With dead ends: 11323 [2021-06-05 05:22:10,180 INFO L226 Difference]: Without dead ends: 11226 [2021-06-05 05:22:10,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1161.9ms TimeCoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:22:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11226 states. [2021-06-05 05:22:10,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11226 to 10176. [2021-06-05 05:22:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 4.485503685503685) internal successors, (45640), 10175 states have internal predecessors, (45640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 45640 transitions. [2021-06-05 05:22:10,366 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 45640 transitions. Word has length 30 [2021-06-05 05:22:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:10,366 INFO L482 AbstractCegarLoop]: Abstraction has 10176 states and 45640 transitions. [2021-06-05 05:22:10,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 45640 transitions. [2021-06-05 05:22:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:10,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:10,383 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:10,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable878 [2021-06-05 05:22:10,584 INFO L430 AbstractCegarLoop]: === Iteration 374 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash 658762064, now seen corresponding path program 95 times [2021-06-05 05:22:10,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:10,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816237290] [2021-06-05 05:22:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:10,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:10,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816237290] [2021-06-05 05:22:10,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816237290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:10,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507931889] [2021-06-05 05:22:10,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:10,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:10,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:10,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:10,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:10,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:10,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:10,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:10,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:22:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:10,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507931889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:10,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:10,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:22:10,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005760747] [2021-06-05 05:22:10,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:22:10,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:22:10,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:22:10,890 INFO L87 Difference]: Start difference. First operand 10176 states and 45640 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:12,118 INFO L93 Difference]: Finished difference Result 11236 states and 49905 transitions. [2021-06-05 05:22:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:22:12,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:12,141 INFO L225 Difference]: With dead ends: 11236 [2021-06-05 05:22:12,141 INFO L226 Difference]: Without dead ends: 11141 [2021-06-05 05:22:12,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 918.3ms TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:22:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11141 states. [2021-06-05 05:22:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11141 to 10176. [2021-06-05 05:22:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 4.485012285012285) internal successors, (45635), 10175 states have internal predecessors, (45635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 45635 transitions. [2021-06-05 05:22:12,327 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 45635 transitions. Word has length 30 [2021-06-05 05:22:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:12,328 INFO L482 AbstractCegarLoop]: Abstraction has 10176 states and 45635 transitions. [2021-06-05 05:22:12,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 45635 transitions. [2021-06-05 05:22:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:12,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:12,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:12,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:12,545 INFO L430 AbstractCegarLoop]: === Iteration 375 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash 106527888, now seen corresponding path program 96 times [2021-06-05 05:22:12,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:12,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377894055] [2021-06-05 05:22:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:12,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:12,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377894055] [2021-06-05 05:22:12,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377894055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:12,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745001893] [2021-06-05 05:22:12,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:12,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:22:12,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:12,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:12,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:12,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:12,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:22:12,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:12,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:12,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:12,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:22:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:12,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745001893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:12,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:12,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:12,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470636153] [2021-06-05 05:22:12,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:12,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:12,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:12,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:12,929 INFO L87 Difference]: Start difference. First operand 10176 states and 45635 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:14,979 INFO L93 Difference]: Finished difference Result 11554 states and 50983 transitions. [2021-06-05 05:22:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:22:14,979 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:15,004 INFO L225 Difference]: With dead ends: 11554 [2021-06-05 05:22:15,004 INFO L226 Difference]: Without dead ends: 11275 [2021-06-05 05:22:15,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1681.3ms TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:22:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2021-06-05 05:22:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 10176. [2021-06-05 05:22:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 4.485012285012285) internal successors, (45635), 10175 states have internal predecessors, (45635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 45635 transitions. [2021-06-05 05:22:15,197 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 45635 transitions. Word has length 30 [2021-06-05 05:22:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:15,197 INFO L482 AbstractCegarLoop]: Abstraction has 10176 states and 45635 transitions. [2021-06-05 05:22:15,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:15,197 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 45635 transitions. [2021-06-05 05:22:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:15,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:15,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:15,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable880 [2021-06-05 05:22:15,415 INFO L430 AbstractCegarLoop]: === Iteration 376 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:15,415 INFO L82 PathProgramCache]: Analyzing trace with hash -529938966, now seen corresponding path program 97 times [2021-06-05 05:22:15,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:15,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578552518] [2021-06-05 05:22:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:15,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:15,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578552518] [2021-06-05 05:22:15,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578552518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:15,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843809916] [2021-06-05 05:22:15,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:15,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:15,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:15,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:15,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:15,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:15,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:15,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:22:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:15,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843809916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:15,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:15,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:15,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908069102] [2021-06-05 05:22:15,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:15,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:15,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:15,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:15,734 INFO L87 Difference]: Start difference. First operand 10176 states and 45635 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:17,178 INFO L93 Difference]: Finished difference Result 11386 states and 50493 transitions. [2021-06-05 05:22:17,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:22:17,178 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:17,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:17,202 INFO L225 Difference]: With dead ends: 11386 [2021-06-05 05:22:17,203 INFO L226 Difference]: Without dead ends: 11269 [2021-06-05 05:22:17,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1044.1ms TimeCoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:22:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2021-06-05 05:22:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 10173. [2021-06-05 05:22:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10173 states, 10172 states have (on average 4.485057019268581) internal successors, (45622), 10172 states have internal predecessors, (45622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10173 states to 10173 states and 45622 transitions. [2021-06-05 05:22:17,398 INFO L78 Accepts]: Start accepts. Automaton has 10173 states and 45622 transitions. Word has length 30 [2021-06-05 05:22:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:17,398 INFO L482 AbstractCegarLoop]: Abstraction has 10173 states and 45622 transitions. [2021-06-05 05:22:17,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 10173 states and 45622 transitions. [2021-06-05 05:22:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:17,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:17,415 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:17,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable882,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:17,616 INFO L430 AbstractCegarLoop]: === Iteration 377 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1851933090, now seen corresponding path program 98 times [2021-06-05 05:22:17,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:17,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603795408] [2021-06-05 05:22:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:17,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:17,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603795408] [2021-06-05 05:22:17,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603795408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:17,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022129009] [2021-06-05 05:22:17,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:17,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:17,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:17,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:17,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:17,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:17,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:17,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:17,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:17,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:17,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:22:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:17,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022129009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:17,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:17,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:17,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593300817] [2021-06-05 05:22:17,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:17,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:17,993 INFO L87 Difference]: Start difference. First operand 10173 states and 45622 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:19,525 INFO L93 Difference]: Finished difference Result 11533 states and 50999 transitions. [2021-06-05 05:22:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:22:19,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:19,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:19,551 INFO L225 Difference]: With dead ends: 11533 [2021-06-05 05:22:19,552 INFO L226 Difference]: Without dead ends: 11426 [2021-06-05 05:22:19,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1138.3ms TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:22:19,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11426 states. [2021-06-05 05:22:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11426 to 10197. [2021-06-05 05:22:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10197 states, 10196 states have (on average 4.483326794821498) internal successors, (45712), 10196 states have internal predecessors, (45712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10197 states to 10197 states and 45712 transitions. [2021-06-05 05:22:19,743 INFO L78 Accepts]: Start accepts. Automaton has 10197 states and 45712 transitions. Word has length 30 [2021-06-05 05:22:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:19,743 INFO L482 AbstractCegarLoop]: Abstraction has 10197 states and 45712 transitions. [2021-06-05 05:22:19,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,743 INFO L276 IsEmpty]: Start isEmpty. Operand 10197 states and 45712 transitions. [2021-06-05 05:22:19,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:19,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:19,760 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:19,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 05:22:19,960 INFO L430 AbstractCegarLoop]: === Iteration 378 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1577378754, now seen corresponding path program 16 times [2021-06-05 05:22:19,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:19,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191582189] [2021-06-05 05:22:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:20,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:20,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191582189] [2021-06-05 05:22:20,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191582189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:20,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138006483] [2021-06-05 05:22:20,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:20,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:20,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:20,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:20,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:20,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:20,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:20,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:20,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:22:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:20,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138006483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:20,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:20,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:22:20,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032347241] [2021-06-05 05:22:20,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:20,311 INFO L87 Difference]: Start difference. First operand 10197 states and 45712 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:22,406 INFO L93 Difference]: Finished difference Result 11842 states and 52267 transitions. [2021-06-05 05:22:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:22:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:22,431 INFO L225 Difference]: With dead ends: 11842 [2021-06-05 05:22:22,431 INFO L226 Difference]: Without dead ends: 11649 [2021-06-05 05:22:22,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1432.3ms TimeCoverageRelationStatistics Valid=523, Invalid=2899, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:22:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11649 states. [2021-06-05 05:22:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11649 to 10189. [2021-06-05 05:22:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10189 states, 10188 states have (on average 4.4825284648606205) internal successors, (45668), 10188 states have internal predecessors, (45668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10189 states to 10189 states and 45668 transitions. [2021-06-05 05:22:22,627 INFO L78 Accepts]: Start accepts. Automaton has 10189 states and 45668 transitions. Word has length 30 [2021-06-05 05:22:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:22,627 INFO L482 AbstractCegarLoop]: Abstraction has 10189 states and 45668 transitions. [2021-06-05 05:22:22,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10189 states and 45668 transitions. [2021-06-05 05:22:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:22,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:22,646 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:22,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 05:22:22,847 INFO L430 AbstractCegarLoop]: === Iteration 379 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1583186662, now seen corresponding path program 99 times [2021-06-05 05:22:22,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:22,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996923719] [2021-06-05 05:22:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:22,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996923719] [2021-06-05 05:22:22,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996923719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111875380] [2021-06-05 05:22:22,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:23,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:22:23,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:23,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:23,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:23,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:23,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:23,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:23,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:22:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:23,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111875380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:23,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:23,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:23,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485230016] [2021-06-05 05:22:23,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:23,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:23,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:23,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:23,174 INFO L87 Difference]: Start difference. First operand 10189 states and 45668 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:25,021 INFO L93 Difference]: Finished difference Result 11564 states and 51173 transitions. [2021-06-05 05:22:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:22:25,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:25,048 INFO L225 Difference]: With dead ends: 11564 [2021-06-05 05:22:25,048 INFO L226 Difference]: Without dead ends: 11455 [2021-06-05 05:22:25,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1303.4ms TimeCoverageRelationStatistics Valid=384, Invalid=1968, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:22:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11455 states. [2021-06-05 05:22:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11455 to 10173. [2021-06-05 05:22:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10173 states, 10172 states have (on average 4.485057019268581) internal successors, (45622), 10172 states have internal predecessors, (45622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10173 states to 10173 states and 45622 transitions. [2021-06-05 05:22:25,244 INFO L78 Accepts]: Start accepts. Automaton has 10173 states and 45622 transitions. Word has length 30 [2021-06-05 05:22:25,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:25,244 INFO L482 AbstractCegarLoop]: Abstraction has 10173 states and 45622 transitions. [2021-06-05 05:22:25,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,244 INFO L276 IsEmpty]: Start isEmpty. Operand 10173 states and 45622 transitions. [2021-06-05 05:22:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:25,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:25,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:25,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:25,462 INFO L430 AbstractCegarLoop]: === Iteration 380 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash 946719808, now seen corresponding path program 100 times [2021-06-05 05:22:25,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:25,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776684529] [2021-06-05 05:22:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:25,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:25,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776684529] [2021-06-05 05:22:25,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776684529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:25,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425599807] [2021-06-05 05:22:25,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:25,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:25,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:25,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:25,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:25,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:25,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:25,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:25,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:22:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:25,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425599807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:25,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:25,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:25,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701904944] [2021-06-05 05:22:25,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:25,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:25,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:25,863 INFO L87 Difference]: Start difference. First operand 10173 states and 45622 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:27,863 INFO L93 Difference]: Finished difference Result 11648 states and 51507 transitions. [2021-06-05 05:22:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:22:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:27,889 INFO L225 Difference]: With dead ends: 11648 [2021-06-05 05:22:27,889 INFO L226 Difference]: Without dead ends: 11493 [2021-06-05 05:22:27,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1527.3ms TimeCoverageRelationStatistics Valid=530, Invalid=2776, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:22:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11493 states. [2021-06-05 05:22:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11493 to 10169. [2021-06-05 05:22:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10169 states, 10168 states have (on average 4.485247836349331) internal successors, (45606), 10168 states have internal predecessors, (45606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10169 states to 10169 states and 45606 transitions. [2021-06-05 05:22:28,091 INFO L78 Accepts]: Start accepts. Automaton has 10169 states and 45606 transitions. Word has length 30 [2021-06-05 05:22:28,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:28,091 INFO L482 AbstractCegarLoop]: Abstraction has 10169 states and 45606 transitions. [2021-06-05 05:22:28,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 10169 states and 45606 transitions. [2021-06-05 05:22:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:28,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:28,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:28,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable886 [2021-06-05 05:22:28,309 INFO L430 AbstractCegarLoop]: === Iteration 381 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:28,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1352137914, now seen corresponding path program 10 times [2021-06-05 05:22:28,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:28,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591834762] [2021-06-05 05:22:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:28,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591834762] [2021-06-05 05:22:28,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591834762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727145976] [2021-06-05 05:22:28,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:28,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:28,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:28,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:28,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:28,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:28,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:28,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:28,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:22:28,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:28,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:28,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:28,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:22:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:28,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727145976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:28,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:28,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:22:28,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839700187] [2021-06-05 05:22:28,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:22:28,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:28,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:22:28,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:22:28,639 INFO L87 Difference]: Start difference. First operand 10169 states and 45606 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:29,213 INFO L93 Difference]: Finished difference Result 10693 states and 47691 transitions. [2021-06-05 05:22:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:22:29,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:29,236 INFO L225 Difference]: With dead ends: 10693 [2021-06-05 05:22:29,237 INFO L226 Difference]: Without dead ends: 10620 [2021-06-05 05:22:29,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:22:29,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10620 states. [2021-06-05 05:22:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10620 to 10192. [2021-06-05 05:22:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10192 states, 10191 states have (on average 4.48483956432146) internal successors, (45705), 10191 states have internal predecessors, (45705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10192 states to 10192 states and 45705 transitions. [2021-06-05 05:22:29,433 INFO L78 Accepts]: Start accepts. Automaton has 10192 states and 45705 transitions. Word has length 30 [2021-06-05 05:22:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:29,433 INFO L482 AbstractCegarLoop]: Abstraction has 10192 states and 45705 transitions. [2021-06-05 05:22:29,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 10192 states and 45705 transitions. [2021-06-05 05:22:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:29,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:29,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:29,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable887,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:29,650 INFO L430 AbstractCegarLoop]: === Iteration 382 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1416758304, now seen corresponding path program 11 times [2021-06-05 05:22:29,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:29,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879293419] [2021-06-05 05:22:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:29,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:29,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879293419] [2021-06-05 05:22:29,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879293419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:29,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927109129] [2021-06-05 05:22:29,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:29,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:29,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:29,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:29,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:29,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:29,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:29,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:22:29,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:29,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:29,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:29,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:22:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:29,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927109129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:29,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:29,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:22:29,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630873698] [2021-06-05 05:22:29,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:22:29,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:29,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:22:29,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:22:29,976 INFO L87 Difference]: Start difference. First operand 10192 states and 45705 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:30,494 INFO L93 Difference]: Finished difference Result 10682 states and 47647 transitions. [2021-06-05 05:22:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:22:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:30,517 INFO L225 Difference]: With dead ends: 10682 [2021-06-05 05:22:30,517 INFO L226 Difference]: Without dead ends: 10607 [2021-06-05 05:22:30,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:22:30,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10607 states. [2021-06-05 05:22:30,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10607 to 10187. [2021-06-05 05:22:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10187 states, 10186 states have (on average 4.484488513646181) internal successors, (45679), 10186 states have internal predecessors, (45679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10187 states to 10187 states and 45679 transitions. [2021-06-05 05:22:30,705 INFO L78 Accepts]: Start accepts. Automaton has 10187 states and 45679 transitions. Word has length 30 [2021-06-05 05:22:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:30,705 INFO L482 AbstractCegarLoop]: Abstraction has 10187 states and 45679 transitions. [2021-06-05 05:22:30,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 10187 states and 45679 transitions. [2021-06-05 05:22:30,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:30,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:30,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:30,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 05:22:30,925 INFO L430 AbstractCegarLoop]: === Iteration 383 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1653841638, now seen corresponding path program 101 times [2021-06-05 05:22:30,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:30,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360506782] [2021-06-05 05:22:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:31,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:31,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360506782] [2021-06-05 05:22:31,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360506782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:31,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531385159] [2021-06-05 05:22:31,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:31,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:31,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:31,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:31,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:31,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:31,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:31,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:22:31,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:31,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:31,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:31,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:22:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:31,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531385159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:31,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:31,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 05:22:31,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400002110] [2021-06-05 05:22:31,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:22:31,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:22:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:22:31,347 INFO L87 Difference]: Start difference. First operand 10187 states and 45679 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:32,230 INFO L93 Difference]: Finished difference Result 10719 states and 47761 transitions. [2021-06-05 05:22:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:22:32,231 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:32,253 INFO L225 Difference]: With dead ends: 10719 [2021-06-05 05:22:32,254 INFO L226 Difference]: Without dead ends: 10646 [2021-06-05 05:22:32,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 522.6ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:22:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10646 states. [2021-06-05 05:22:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10646 to 10191. [2021-06-05 05:22:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10191 states, 10190 states have (on average 4.4846908734053) internal successors, (45699), 10190 states have internal predecessors, (45699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10191 states to 10191 states and 45699 transitions. [2021-06-05 05:22:32,441 INFO L78 Accepts]: Start accepts. Automaton has 10191 states and 45699 transitions. Word has length 30 [2021-06-05 05:22:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:32,441 INFO L482 AbstractCegarLoop]: Abstraction has 10191 states and 45699 transitions. [2021-06-05 05:22:32,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 10191 states and 45699 transitions. [2021-06-05 05:22:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:32,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:32,459 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:32,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable889,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:32,660 INFO L430 AbstractCegarLoop]: === Iteration 384 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:32,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1033357572, now seen corresponding path program 102 times [2021-06-05 05:22:32,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:32,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974869898] [2021-06-05 05:22:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:32,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974869898] [2021-06-05 05:22:32,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974869898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713151525] [2021-06-05 05:22:32,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:32,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:22:32,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:32,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:33,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:33,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:22:33,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:33,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:33,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:33,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 05:22:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:33,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713151525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:33,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:33,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 05:22:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469896354] [2021-06-05 05:22:33,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:22:33,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:33,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:22:33,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:22:33,046 INFO L87 Difference]: Start difference. First operand 10191 states and 45699 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:33,865 INFO L93 Difference]: Finished difference Result 10595 states and 47268 transitions. [2021-06-05 05:22:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:22:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:33,890 INFO L225 Difference]: With dead ends: 10595 [2021-06-05 05:22:33,890 INFO L226 Difference]: Without dead ends: 10529 [2021-06-05 05:22:33,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:22:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10529 states. [2021-06-05 05:22:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10529 to 10187. [2021-06-05 05:22:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10187 states, 10186 states have (on average 4.484488513646181) internal successors, (45679), 10186 states have internal predecessors, (45679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10187 states to 10187 states and 45679 transitions. [2021-06-05 05:22:34,084 INFO L78 Accepts]: Start accepts. Automaton has 10187 states and 45679 transitions. Word has length 30 [2021-06-05 05:22:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:34,084 INFO L482 AbstractCegarLoop]: Abstraction has 10187 states and 45679 transitions. [2021-06-05 05:22:34,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 10187 states and 45679 transitions. [2021-06-05 05:22:34,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:34,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:34,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:34,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:34,302 INFO L430 AbstractCegarLoop]: === Iteration 385 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:34,302 INFO L82 PathProgramCache]: Analyzing trace with hash 462027774, now seen corresponding path program 12 times [2021-06-05 05:22:34,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:34,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230600388] [2021-06-05 05:22:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:34,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:34,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230600388] [2021-06-05 05:22:34,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230600388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:34,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707320948] [2021-06-05 05:22:34,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:34,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:34,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:34,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:22:34,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:34,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:34,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:34,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:34,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:22:34,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:34,755 INFO L628 ElimStorePlain]: treesize reduction 37, result has 48.6 percent of original size [2021-06-05 05:22:34,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:34,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:39 [2021-06-05 05:22:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:34,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707320948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:34,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:34,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2021-06-05 05:22:34,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164505295] [2021-06-05 05:22:34,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:34,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:34,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:34,832 INFO L87 Difference]: Start difference. First operand 10187 states and 45679 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:36,908 INFO L93 Difference]: Finished difference Result 11788 states and 52159 transitions. [2021-06-05 05:22:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:22:36,908 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:36,935 INFO L225 Difference]: With dead ends: 11788 [2021-06-05 05:22:36,935 INFO L226 Difference]: Without dead ends: 11717 [2021-06-05 05:22:36,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1297.2ms TimeCoverageRelationStatistics Valid=431, Invalid=3475, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:22:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11717 states. [2021-06-05 05:22:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11717 to 10198. [2021-06-05 05:22:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10198 states, 10197 states have (on average 4.485731097381583) internal successors, (45741), 10197 states have internal predecessors, (45741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10198 states to 10198 states and 45741 transitions. [2021-06-05 05:22:37,143 INFO L78 Accepts]: Start accepts. Automaton has 10198 states and 45741 transitions. Word has length 30 [2021-06-05 05:22:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:37,143 INFO L482 AbstractCegarLoop]: Abstraction has 10198 states and 45741 transitions. [2021-06-05 05:22:37,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 10198 states and 45741 transitions. [2021-06-05 05:22:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:37,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:37,160 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:37,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable891 [2021-06-05 05:22:37,361 INFO L430 AbstractCegarLoop]: === Iteration 386 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1327683226, now seen corresponding path program 103 times [2021-06-05 05:22:37,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:37,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538123446] [2021-06-05 05:22:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:37,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:37,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538123446] [2021-06-05 05:22:37,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538123446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:37,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291641509] [2021-06-05 05:22:37,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:37,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:37,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:37,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:37,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:37,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:37,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:22:37,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:37,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:37,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:37,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 05:22:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:37,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291641509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:37,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:37,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 05:22:37,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570911117] [2021-06-05 05:22:37,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:37,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:37,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:37,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:37,827 INFO L87 Difference]: Start difference. First operand 10198 states and 45741 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:39,127 INFO L93 Difference]: Finished difference Result 11032 states and 49013 transitions. [2021-06-05 05:22:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:22:39,128 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:39,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:39,153 INFO L225 Difference]: With dead ends: 11032 [2021-06-05 05:22:39,153 INFO L226 Difference]: Without dead ends: 10968 [2021-06-05 05:22:39,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 743.9ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:22:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10968 states. [2021-06-05 05:22:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10968 to 10196. [2021-06-05 05:22:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10196 states, 10195 states have (on average 4.4858263854830795) internal successors, (45733), 10195 states have internal predecessors, (45733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10196 states to 10196 states and 45733 transitions. [2021-06-05 05:22:39,399 INFO L78 Accepts]: Start accepts. Automaton has 10196 states and 45733 transitions. Word has length 30 [2021-06-05 05:22:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:39,400 INFO L482 AbstractCegarLoop]: Abstraction has 10196 states and 45733 transitions. [2021-06-05 05:22:39,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10196 states and 45733 transitions. [2021-06-05 05:22:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:39,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:39,417 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:39,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable896,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:39,617 INFO L430 AbstractCegarLoop]: === Iteration 387 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:39,618 INFO L82 PathProgramCache]: Analyzing trace with hash 379171004, now seen corresponding path program 104 times [2021-06-05 05:22:39,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:39,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070599562] [2021-06-05 05:22:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:39,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:39,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070599562] [2021-06-05 05:22:39,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070599562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:39,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560420906] [2021-06-05 05:22:39,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:39,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:39,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:39,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:39,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:39,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 05:22:39,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:39,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:39,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:39,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 05:22:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:40,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560420906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:40,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:40,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 05:22:40,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111244667] [2021-06-05 05:22:40,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:22:40,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:40,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:22:40,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:22:40,052 INFO L87 Difference]: Start difference. First operand 10196 states and 45733 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:40,941 INFO L93 Difference]: Finished difference Result 10640 states and 47476 transitions. [2021-06-05 05:22:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:22:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:22:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:40,963 INFO L225 Difference]: With dead ends: 10640 [2021-06-05 05:22:40,963 INFO L226 Difference]: Without dead ends: 10567 [2021-06-05 05:22:40,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 672.6ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:22:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10567 states. [2021-06-05 05:22:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10567 to 10204. [2021-06-05 05:22:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10204 states, 10203 states have (on average 4.486131529942174) internal successors, (45772), 10203 states have internal predecessors, (45772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10204 states to 10204 states and 45772 transitions. [2021-06-05 05:22:41,158 INFO L78 Accepts]: Start accepts. Automaton has 10204 states and 45772 transitions. Word has length 30 [2021-06-05 05:22:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:41,158 INFO L482 AbstractCegarLoop]: Abstraction has 10204 states and 45772 transitions. [2021-06-05 05:22:41,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 10204 states and 45772 transitions. [2021-06-05 05:22:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:22:41,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:41,175 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:41,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable897 [2021-06-05 05:22:41,376 INFO L430 AbstractCegarLoop]: === Iteration 388 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:22:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:41,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1905242082, now seen corresponding path program 105 times [2021-06-05 05:22:41,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:41,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836689737] [2021-06-05 05:22:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:41,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:41,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836689737] [2021-06-05 05:22:41,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836689737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:41,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340460560] [2021-06-05 05:22:41,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:41,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:41,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:41,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:41,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:41,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 05:22:41,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:41,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:41,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:41,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 Received shutdown request... [2021-06-05 05:22:41,861 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-06-05 05:22:42,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:42,062 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:22:42,063 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:22:42,065 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:22:42,065 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:22:42 BasicIcfg [2021-06-05 05:22:42,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:22:42,066 INFO L168 Benchmark]: Toolchain (without parser) took 769837.42 ms. Allocated memory was 337.6 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 317.0 MB in the beginning and 1.3 GB in the end (delta: -995.0 MB). Peak memory consumption was 968.0 MB. Max. memory is 16.0 GB. [2021-06-05 05:22:42,066 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 337.6 MB. Free memory was 318.2 MB in the beginning and 318.1 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:22:42,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.59 ms. Allocated memory is still 337.6 MB. Free memory was 316.9 MB in the beginning and 315.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:22:42,066 INFO L168 Benchmark]: Boogie Preprocessor took 29.81 ms. Allocated memory is still 337.6 MB. Free memory was 315.4 MB in the beginning and 314.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:22:42,066 INFO L168 Benchmark]: RCFGBuilder took 316.77 ms. Allocated memory is still 337.6 MB. Free memory was 314.3 MB in the beginning and 296.2 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-06-05 05:22:42,067 INFO L168 Benchmark]: TraceAbstraction took 769442.78 ms. Allocated memory was 337.6 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 322.3 MB in the beginning and 1.3 GB in the end (delta: -989.7 MB). Peak memory consumption was 972.2 MB. Max. memory is 16.0 GB. [2021-06-05 05:22:42,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 337.6 MB. Free memory was 318.2 MB in the beginning and 318.1 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.59 ms. Allocated memory is still 337.6 MB. Free memory was 316.9 MB in the beginning and 315.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.81 ms. Allocated memory is still 337.6 MB. Free memory was 315.4 MB in the beginning and 314.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 316.77 ms. Allocated memory is still 337.6 MB. Free memory was 314.3 MB in the beginning and 296.2 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 769442.78 ms. Allocated memory was 337.6 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 322.3 MB in the beginning and 1.3 GB in the end (delta: -989.7 MB). Peak memory consumption was 972.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 14ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 769234.6ms, OverallIterations: 388, TraceHistogramMax: 2, EmptinessCheckTime: 3491.9ms, AutomataDifference: 504510.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 55.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42714 SDtfs, 111214 SDslu, 398032 SDs, 0 SdLazy, 452570 SolverSat, 44806 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 180114.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23484 GetRequests, 8032 SyntacticMatches, 578 SemanticMatches, 14874 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200765 ImplicationChecksByTransitivity, 350808.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10204occurred in iteration=387, InterpolantAutomatonStates: 13398, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 39109.8ms AutomataMinimizationTime, 387 MinimizatonAttempts, 492985 StatesRemovedByMinimization, 384 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2170.8ms SsaConstructionTime, 4949.3ms SatisfiabilityAnalysisTime, 128914.1ms InterpolantComputationTime, 22028 NumberOfCodeBlocks, 22028 NumberOfCodeBlocksAsserted, 1183 NumberOfCheckSat, 21264 ConstructedInterpolants, 795 QuantifiedInterpolants, 277528 SizeOfPredicates, 2949 NumberOfNonLiveVariables, 47561 ConjunctsInSsa, 10549 ConjunctsInUnsatCore, 764 InterpolantComputations, 10 PerfectInterpolantSequences, 171/3482 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown